| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | DETECTING DEVICE AND ELECTRONIC APPARATUS | US14843171 | 2015-09-02 | US20160072458A1 | 2016-03-10 | Gakuji YAMAMOTO |
| A detecting device includes a pyroelectric element that generates charge by a pyroelectric effect in a first detection terminal and a second detection terminal, a chopper amplifier circuit that generates an amplified signal in response to the charge generated in the first detection terminal and the second detection terminal by chopping, and an initialization switch that controls electrical connection between the second detection terminal and a power source for generating an initialized voltage, and the initialization switch is turned on before a start of an amplification operation by the amplifier circuit and is off during the amplification operation. | ||||||
| 102 | Chopper-stabilized instrumentation amplifier for impedance measurement | US12579276 | 2009-10-14 | US09197173B2 | 2015-11-24 | Timothy J. Denison; Wesley A. Santa |
| This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The instrumentation amplifier uses a differential architecture and a mixer amplifier to substantially eliminate noise and offset from an output signal produced by the amplifier. Dynamic limitations, i.e., glitching, that result from chopper stabilization at low power are substantially eliminated through a combination of chopping at low impedance nodes within the mixer amplifier and feedback. The signal path of the amplifier operates as a continuous time system, providing minimal aliasing of noise or external signals entering the signal pathway at the chop frequency or its harmonics. The amplifier can be used in a low power system, such as an implantable medical device, to provide a stable, low-noise output signal. | ||||||
| 103 | Signal processing circuit, resolver digital converter, and multipath nested mirror amplifier | US14254294 | 2014-04-16 | US09166541B2 | 2015-10-20 | Yoshihiro Funato; Toshio Kumamoto; Tomoaki Yoshizawa; Kazuaki Kurooka |
| A signal processing circuit includes a chopper amplifier that has a differential amplifier circuit that amplifies differential input signals Vsp(t) and Vsm(t), and an adder circuit that generates an addition signal Vfil(t) by addition of the chopper output signal Vsub(t) that the chopper amplifier generates. Differential signals inputted into the differential amplifier circuit are interchanged for every first phase period and second phase period, and the adder circuit generates the addition signal by addition of the chopper output signal in the first phase period and in the second phase period. | ||||||
| 104 | RECONFIGURABLE MEASURING APPARATUS AND METHOD FOR CONTROLLING APPARATUS | US14199319 | 2014-03-06 | US20150065908A1 | 2015-03-05 | Jong Pal KIM |
| A reconfigurable measuring apparatus includes a first chopper configured to modulate an input signal, and an amplifier configured to amplify an output signal of the first chopper. The reconfigurable measuring apparatus further includes a second chopper configured to demodulate an output signal of the amplifier, and a controller configured to control the first chopper and the second chopper based on a measurement mode. | ||||||
| 105 | CHOPPER AMPLIFIER | US14248452 | 2014-04-09 | US20140312967A1 | 2014-10-23 | Takeshi Nagahisa |
| A chopper amplifier includes a chopper modulator to modulate a certain detection signal and a bias voltage by a certain control signal and output a chopper modulation signal, a first differential amplifier to differentially amplify the chopper modulation signal from the chopper modulator and output a differential modulation signal, a chopper demodulator to demodulate the differential modulation signal from the first differential amplifier by the control signal and output a demodulation signal, a second differential amplifier to extract a detection signal component from the demodulation signal, and a plurality of filters connected at an input terminal of the second differential amplifier and having different cutoff frequencies from each other relative to the demodulation signal. | ||||||
| 106 | Integrated Amplifier for Driving Acoustic Transducers | US13808604 | 2011-08-02 | US20130208922A1 | 2013-08-15 | Germano Nicollini; Federico Guanziroli; Massimo Orio; Carlo Pinna |
| The invention relates to an electronic integrated amplifier for driving an acoustic transducer. The amplifier comprises two differential input terminals to receive an input signal and a first and a second output terminal to provide an output signal to the transducer. In addition, the amplifier comprises an operational amplifier having an input end including differential inputs and an output end operatively associated with the first and second output terminals. A pair of input resistors connect the two differential input terminals to two intermediate terminals, respectively. A pair of feedback resistors connect the first and second output terminals to the two intermediate terminals, respectively. The integrated amplifier also comprises means for high-pass filtering the input signal. Such filtering means is characterized in that it comprises an input element interposed between said intermediate terminals and the input end of the operational amplifier, and a feedback element connected between the input end and the output end of the same operational amplifier. | ||||||
| 107 | Power amplifier | US13015024 | 2011-01-27 | US08253485B2 | 2012-08-28 | John Christopher Clifton |
| A power amplifier comprises a series stack of power amplifier devices, connected in parallel to the amplifier input for receiving an RF input signal, and having output terminals being connected in series to the amplifier output. An intermediate coupling capacitor is connected between each adjacent pair of power amplifier devices in the series stack of power amplifier devices for DC isolation of said power amplifier devices. This reduces the required DC supply voltage, as well as allowing shorting of individual power amplifier devices in response to variation in the DC supply voltage. | ||||||
| 108 | Receiving device and related method for calibrating DC offset | US12060849 | 2008-04-01 | US08095101B2 | 2012-01-10 | Pei-Ju Chiu; Chia-Jun Chang; Chao-Cheng Lee |
| A receiving device includes a mixer, an AC coupling circuit, a post-stage circuit, and a DC offset calibration circuit. The mixer is utilized for mixing an input signal with a local oscillating (LO) signal from an oscillator to generate a converted signal. The AC coupling circuit is coupled to the mixer and utilized for reducing at least one portion of DC offset of the converted signal to generate a filtered signal. The post-stage circuit is coupled to the AC coupling circuit and utilized for processing the filtered signal to generate an output signal. The DC offset calibration circuit is coupled to the post-stage circuit and utilized for providing at least a compensation current for the post-stage circuit to reduce DC offset of the output signal. | ||||||
| 109 | Low input bias current chopping switch circuit and method | US12803468 | 2010-06-28 | US08072262B1 | 2011-12-06 | Rodney T. Burt; Joy Y. Zhang |
| A chopper-stabilized circuit (1) includes pre-chopping circuitry (26) for chopping an input signal (Vin) at a first frequency to generate a first signal. Input chopping circuitry (9) chops the first signal at a second frequency substantially greater than the first frequency to produce a second signal. The first frequency is a sub-harmonic of the second frequency. Post-chopping circuitry (30) chops the second chopped signal at the first frequency to produce a third signal that is applied to an input of a signal conditioning circuit (2). The output chopping circuitry (10) chops an output of the signal conditioning circuit at the second frequency to generate a fourth signal. The fourth signal is filtered. | ||||||
| 110 | Digital isolator with communication across an isolation barrier | US11683985 | 2007-03-08 | US07923710B2 | 2011-04-12 | Philip John Crawley; Sajol Ghoshal; John R. Camagna |
| A signal isolator comprises an isolation barrier, a transmitter, a differentiator, and a recovery circuit. The transmitter is coupled to a first side of the isolation barrier and is configured to receive and convert an information signal to a differential signal that encodes information in the information signal in a single transition edge. The differentiator is coupled to a second side that is isolated from the first side of the isolation harrier and differentiates the differential signal. The recovery circuit is coupled to the differentiator and operates to recover an output information signal based on the information in the single transition edge. | ||||||
| 111 | Switching amplifiers | US12270692 | 2008-11-13 | US07816985B2 | 2010-10-19 | Brian E Attwood; Wilson E. Taylor; Larry E. Hand |
| Systems and methods implemented in a switching amplifier for providing consistent, matching switching between top and bottom switching devices in a switching amplifier. One embodiment includes a half-bridge circuit output stage, a driver stage and a transformer. The driver stage, which drives the switches of the output stage, is very fast, has a low propagation delay, and has minimal input capacitance. The transformer drives the drive paths from the transformer inputs to the switches. The transformer avoids resonances within the audio band and at the amplifier switching frequencies, has low and spread free leakage inductance, has enough magnetizing inductance to keep transformer currents low in proportion to the total driver stage current drain, has low core losses at the switching frequency, has minimal inductance change and operates well below its saturation point. The amplifier stage provides a substantially constant amplitude drive signal to the output power switching devices. | ||||||
| 112 | TRANSFORMER-CAPACITOR ENHANCEMENT CIRCUITRY FOR POWER AMPLIFIERS | US11912732 | 2006-04-27 | US20090295475A1 | 2009-12-03 | Israel Bar-David; Alexander Veinblat |
| Circuitry for providing improved pulse-type enhancement of the voltage supplied to a power amplifier (101) that is fed by a power supply that is connected to the power amplifier (101) at a feeding point through a main supply path that is connected via an inductor (L1). A second feeding point is used for enhancement by a capacitor that is discharged. A transformer L2, L3, M) is formed by mutually coupling an additional inductor (L3), through which an additional supply path is connected. Enhancement power is provided partially through the transformer L2, L3, M) and the remaining part thorough the capacitor (C1). This way, the total level of possible enhancement is increased, while minimizing distortion of the envelope of the amplified RF signal. | ||||||
| 113 | Chopper-stabilized instrumentation amplifier for impedance measurement | US12058066 | 2008-03-28 | US07622988B2 | 2009-11-24 | Timothy J. Denison; Wesley A. Santa |
| This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The instrumentation amplifier uses a differential architecture and a mixer amplifier to substantially eliminate noise and offset from an output signal produced by the amplifier. Dynamic limitations, i.e., glitching, that result from chopper stabilization at low power are substantially eliminated through a combination of chopping at low impedance nodes within the mixer amplifier and feedback. The signal path of the amplifier operates as a continuous time system, providing minimal aliasing of noise or external signals entering the signal pathway at the chop frequency or its harmonics. The amplifier can be used in a low power system, such as an implantable medical device, to provide a stable, low-noise output signal. | ||||||
| 114 | Signal detecting circuit | US12033171 | 2008-02-19 | US07570044B2 | 2009-08-04 | Toru Takeda |
| The signal detecting circuit has a first amplifier which amplifies the supplied signals and outputs the amplified signals from first and second output terminals; a switch unit which supplies the signals to the first amplifier such that the polarity thereof is reversed between the first and second periods; a first capacitor, one end of which is connected to the first output terminal; a second capacitor, one end of which is connected to the second output terminal; a first switch, one end of which is connected to the other end of the second capacitor; a second amplifier having an inverting input terminal connected to the other end of the first capacitor, a non-inverting input terminal connected to the other end of the first switch, and an output terminal; a second switch which is connected to between the output terminal and the inverting input terminal, a third switch, one end of which is connected to the other end of the second capacitor; a fourth switch, one end of which is connected to the other end of the non-inverting input terminal; a threshold voltage source which is connected to between the other end of the third switch and the other end of the fourth switch; and a reference voltage source which is connected to either one of the other end of the third switch and the other end of the fourth switch. In the first period, the first switch is off, and the second to fourth switches are on; in the second period, the first switch is on, and the second to fourth switches are off. | ||||||
| 115 | SIGNAL DETECTING CIRCUIT | US12033171 | 2008-02-19 | US20080197834A1 | 2008-08-21 | Toru Takeda |
| The signal detecting circuit has a first amplifier which amplifies the supplied signals and outputs the amplified signals from first and second output terminals; a switch unit which supplies the signals to the first amplifier such that the polarity thereof is reversed between the first and second periods; a first capacitor, one end of which is connected to the first output terminal; a second capacitor, one end of which is connected to the second output terminal; a first switch, one end of which is connected to the other end of the second capacitor; a second amplifier having an inverting input terminal connected to the other end of the first capacitor, a non-inverting input terminal connected to the other end of the first switch, and an output terminal; a second switch which is connected to between the output terminal and the inverting input terminal, a third switch, one end of which is connected to the other end of the second capacitor; a fourth switch, one end of which is connected to the other end of the non-inverting input terminal; a threshold voltage source which is connected to between the other end of the third switch and the other end of the fourth switch; and a reference voltage source which is connected to either one of the other end of the third switch and the other end of the fourth switch. In the first period, the first switch is off, and the second to fourth switches are on; in the second period, the first switch is on, and the second to fourth switches are off. | ||||||
| 116 | CHOPPER-STABILIZED INSTRUMENTATION AMPLIFIER FOR IMPEDANCE MEASUREMENT | US12058066 | 2008-03-28 | US20080183098A1 | 2008-07-31 | Timothy J. Denison; Wesley A. Santa |
| This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The instrumentation amplifier uses a differential architecture and a mixer amplifier to substantially eliminate noise and offset from an output signal produced by the amplifier. Dynamic limitations, i.e., glitching, that result from chopper stabilization at low power are substantially eliminated through a combination of chopping at low impedance nodes within the mixer amplifier and feedback. The signal path of the amplifier operates as a continuous time system, providing minimal aliasing of noise or external signals entering the signal pathway at the chop frequency or its harmonics. The amplifier can be used in a low power system, such as an implantable medical device, to provide a stable, low-noise output signal. | ||||||
| 117 | SWITCHING AMPLIFIERS | PCT/US2008083677 | 2008-11-14 | WO2009065068A3 | 2009-08-20 | ATTWOOD BRIAN E; TAYLOR WILSON E; HAND LARRY E |
| Systems and methods implemented in a switching amplifier for providing consistent, matching switching between top and bottom switching devices in a switching amplifier. One embodiment includes a half-bridge circuit output stage, a driver stage and a transformer. The driver stage, which drives the switches of the output stage, is very fast, has a low propagation delay, and has minimal input capacitance. The transformer drives the drive paths from the transformer inputs to the switches. The transformer avoids resonances within the audio band and at the amplifier switching frequencies, has low and spread free leakage inductance, has enough magnetizing inductance to keep transformer currents low in proportion to the total driver stage current drain, has low core losses at the switching frequency, has minimal inductance change and operates well below its saturation point. The amplifier stage provides a substantially constant amplitude drive signal to the output power switching devices. | ||||||
| 118 | 재구성 가능한 측정 장치 및 그 장치를 제어하는 방법 | KR1020130102309 | 2013-08-28 | KR1020150025109A | 2015-03-10 | 김종팔 |
| 재구성 가능한 측정 장치 및 그 장치를 제어하는 방법이 개시된다. 일 실시예에 따른 장치는 변조부, 증폭기, 및 복조부를 포함하고, 설정 가능한 측정 모드에 따라 변조부 및 복조부를 제어할 수 있다. 여기서, 변조부 및 복조부는 초퍼로 구성될 수 있다.
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| 119 | 신호 처리 회로, 리졸버 디지털 컨버터 및 멀티패스 네스티드 미러 증폭 회로 | KR1020140057202 | 2014-05-13 | KR1020140135109A | 2014-11-25 | 후나또요시히로; 구마모또도시오; 요시자와도모아끼; 구로오까가즈아끼 |
| 초퍼 증폭기의 출력을 가산 처리하여, 오프셋 전압을 제거한 신호를 생성하는 경우, 그 가산 처리를 행하는 회로에 기인하는 오프셋 전압이, 더 중첩된다. 신호 처리 회로(1)는 차동 입력 신호(Vsp(t)/Vsm(t))를 증폭하는 차동 증폭 회로(AMP1)를 갖는 초퍼 증폭기(1A)와, 초퍼 증폭기가 생성하는 초퍼 출력 신호(Vsub(t))를 가산하여, 가산 신호(Vfil(t))를 생성하는 가산 회로(1B)를 구비한다. 차동 증폭 회로에 입력되는 차동 신호는, 제어 클록(CLK1)의 제1 위상 기간 및 제2 위상 기간마다 교체되고, 가산 회로는, 제1 위상 기간 및 제2 위상 기간에 있어서의 초퍼 출력 신호를 가산하여, 가산 신호를 생성한다.
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| 120 | 임피던스 측정을 위한 초퍼 안정화 계측증폭기 | KR1020097018019 | 2007-03-23 | KR101114674B1 | 2012-05-08 | 데니슨,티모시제이.; 산타,웨슬리에이. |
| 본 발명은 초퍼안정화 계측증폭기에 관한 것이다. 증폭기는 매우 낮은 전력소모에서 저주파로 안정적인 측정을 달성하도록 구성된다. 계측증폭기는 증폭기에 의해 출력되는 출력 신호로부터 생성되는 오프셋과 잡음을 실질적으로 제거하기 위해 차동 구조와 혼합 증폭기를 사용한다. 저전력에서의 초퍼 안정화에 대한 결과인 동적 결함, 즉 글리칭은 혼합 증폭기와 피드백 안쪽의 낮은 임피던스 노드들에서의 초핑 조합을 통해 실질적으로 제거될 수 있다. 증폭기의 신호경로는 초퍼 주파수 대역 혹은 초퍼 주파수의 고조파 주파수 대역에서 신호 전송로에 들어오는 외부 신호나 잡음의 왜곡을 최소화함으로써 연속 시간 시스템으로 동작한다. 이와 같은 증폭기는 이식가능형 의료기기 등과 같이 안정적이고 저잡음의 출력신호를 제공하기 위한 저전력 시스템에 사용될 수 있다. 계측증폭기, 혼합 증폭기, 차동 신호, 초핑, 피드백 경로, 잡음, 이식가능형 의료기기 | ||||||
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