| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | METHOD AND ARRANGEMENT FOR DRIVING A MICROPHONE | EP10845362 | 2010-09-13 | EP2532090A4 | 2014-10-22 | ERIKSSON SVEN-ÄKE |
| Disclosed is a differential microphone pre-amplifier circuit (120) for providing an amplified differential signal at a first (A) and a second (B) output terminal of the microphone pre-amplifier (120), including a first voltage controlled current generator (101), a second voltage controlled current generator (102) and a third voltage controlled current generator (103) all being configured to receive, amplify and convert a voltage signal generated by an associated microphone (110) to a current signal output. | ||||||
| 182 | METHOD AND ARRANGEMENT FOR DRIVING A MICROPHONE | EP10845362.2 | 2010-09-13 | EP2532090A1 | 2012-12-12 | ERIKSSON, Sven-Äke |
| Disclosed is a differential microphone pre-amplifier circuit (120) for providing an amplified differential signal at a first (A) and a second (B) output terminal of the microphone pre- amplifier (120), including a first voltage controlled current generator (101), a second voltage controlled current generator (102) and a third voltage controlled current generator (103) all being configured to receive, amplify and convert a voltage signal generated by an associated microphone (110) to a current signal output. | ||||||
| 183 | METHOD AND SYSTEM FOR AMPLIFYING A SIGNAL USING A TRANSFORMER MATCHED TRANSISTOR | EP09741524.4 | 2009-10-13 | EP2356740B1 | 2012-10-10 | HESTON, John, G.; MOONEY, Jon |
| 184 | Differential amplifier | EP08022567.5 | 2008-12-30 | EP2086109B1 | 2012-06-20 | Yamaguchi, Kouichiro |
| 185 | Output signal converter for tube amplifiers | EP06019450.3 | 1998-12-04 | EP1732212B1 | 2012-02-01 | Mori, Yasuhiko; Mieda, Fumio; Mitoma, Hirofumi |
| 186 | DISTRIBUTED CIRCULAR GEOMETRY POWER AMPLIFIER ARCHITECTURE | EP01986805.8 | 2001-10-09 | EP1400012B1 | 2011-08-31 | AOKI, Ichiro California Institute of Technology; HAJIMIRI, S.A. California Institute of Technology; RUTLEDGE, David California Institute of Technology |
| The present invention discloses a distributed power amplifier topology and device that efficiently and economically enhances the power output of an RF signal to be amplified. The power amplifier comprises a plurality of push-pull amplifiers interconnected in a novel circular geometry that preferably function as a first winding of an active transformer having signal inputs of adjacent amplification devices driven with an input signal of equal magnitude and opposite phase. The topology also discloses the use of a secondary winding that matches the geometry of primary winding and variations thereof that serve to efficiently combine the power of the individual power amplifiers. The novel architecture enables the design of low-cost, fully-integrated, high-power amplifiers in the RF, microwave, and millimeter-wave frequencies. | ||||||
| 187 | Distributed active transformer amplifier with differential power combiner | EP09179210.1 | 2009-12-15 | EP2204906A1 | 2010-07-07 | Pallotta, Andrea |
A power amplifier (30) formed by a plurality of pairs (39) of transistors (40, 41), each pair comprising a first transistor and a second transistor having each a respective input terminal and a respective output terminal. The output terminals of the first and second transistors of each pair are connected to an output distributed active transformer (32) connected to a differential output (48) of the power amplifier. The input terminals of the first and second transistors of each pair are connected to an input distributed active transformer (31) connected to an input (37) of the power amplifier.
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| 188 | FM ANTENNA AMPLIFIER | EP02738857.8 | 2002-06-28 | EP1401097B1 | 2010-03-03 | ISHIBAYASHI, Katsushiro |
| An FM antenna amplifier including a transformer (T) having a primary winding whose one end is connected to an input terminal to which a signal received by an FM antenna is fed and a secondary winding whose one end is fed with power supply voltage and whose arbitrary middle point is connected to an output terminal and a plurality of FETs, for example, three FETs (21 to 23) each having a source connected to the other end of the first winding of this transformer (T) in parallel, a drain connected to the other end of the secondary winding of the transformer in parallel, and a gate grounded. | ||||||
| 189 | POWER CONVERSION REGULATOR WITH EXPONENTIATING FEEDBACK LOOP | EP06836997 | 2006-11-06 | EP1946444A4 | 2009-10-28 | LAWSON THOMAS E; MORONG WILLIAM H |
| 190 | Differential amplifier | EP08022567.5 | 2008-12-30 | EP2086109A1 | 2009-08-05 | Yamaguchi, Kouichiro |
A differential amplifier (100) comprises a left amplifier having transistors (104, 107, 111), a right amplifier having transistors (131, 133, 137), a negative feedback network having a resistor (118), and a negative feedback network having a transformer (103) with a center tap. Phase compensation networks comprising a capacitor (116) and a resistor (119), a capacitor (117) and a resistor (108), and a capacitor (140) and a resistor (134) are further added to the amplifier. Both ends of a secondary winding of the transformer (103) are connected to the output terminals of the right and left amplifiers, and the center tap of the secondary winding is grounded, so that a differential amplified output signal can be fed back to a single-phase input using one transformer, thereby reducing a cost and an area.
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| 191 | POWER CONVERSION REGULATOR WITH EXPONENTIATING FEEDBACK LOOP | EP06836997.4 | 2006-11-06 | EP1946444A2 | 2008-07-23 | LAWSON, Thomas, E.; MORONG, William, H. |
| A feedback control loop around a gain element controls the output signal of said gain element responsive to an input or reference signal, and is additionally responsive to a non-linear feedback signal. The feedback loop of this invention comprises computation means for exponentiating a signal representing the output of the gain element to generate said non-linear feedback signal. The control loop of invention provides exceptional transient response when used for driving reactive loads. | ||||||
| 192 | POWER CONVERSION REGULATOR WITH PREDICTIVE ENERGY BALANCING | EP06836996.6 | 2006-11-06 | EP1920532A2 | 2008-05-14 | MORONG, William H.; LAWSON, Thomas E. |
| A power-conversion regulator comprising an inductive reactor, an output filter reactor, and a switch for admitting energy to the inductive reactor, additionally comprises computation circuitry responsive to the flux in the inductive reactor, to a reference signal, to an output voltage, and sometimes to an output load current, for computing the quantity of energy that must be supplied to a load and to the output filter reactor to regulate the output voltage or current to a desired relationship with the reference signal during each chopping waveform cycle driving the switch. As the inductive reactor is charged from an input energy source, the computation circuitry predicts whether the energy in the inductive reactor has become adequate for the regulation. | ||||||
| 193 | METHOD AND APPARATUS FOR AN IMPROVED POWER AMPLIFIER | EP06718958.9 | 2006-01-17 | EP1854208A2 | 2007-11-14 | BURNS, Lawrence; WOO, Chong; SANDER, Wendell |
| An amplifier system (52) is provided that has a first balun (48) with an input and an output, and a second balun (18) with an input a an output. A first set of amplifiers (40) is coupled in series and to the output of the first balun (48). A second set of amplifiers (36) is coupled in series and to the output of the second balun. The first and second sets of amplifiers are in series of parallel. A load impedance of the first and second sets of amplifier does not substantially change at an output of any amplifier that is switched on when another amplifier is switched off. | ||||||
| 194 | PHOTORECEIVER ASSEMBLY FOR HIGH-POWERED LASERS | EP02798142.2 | 2002-09-06 | EP1423928B1 | 2006-12-20 | FILKINS, Robert, J.; DRAKE, Thomas, E. |
| A photoreceiver assembly separates low level, high frequency signals from a large, low frequency pulse. The photoreceiver assembly extracts high frequency ultrasonic signal from the optical frequency of light by shining an ultrasonic base band signal onto a photodetector for conversion into an electrical signal in the bandwidth of interest. A photodetector is coupled to a splitter, which is coupled to a plurality of transimpedance signal paths. In operation, the splitter receives a current from the photodetector, separates, and directs the current to transimpedance signal paths. The photoreceiver further includes a transimpedance amplifier assembly coupled to the transimpedance signal paths. The transimpedance amplifier assembly converts the high frequency component of the current into a signal voltage that defines an ultrasonic signal. The transimpedance amplifier assembly includes a forward path gain arrangement for accommodating the electrical configuration of the splitter. | ||||||
| 195 | Output signal converter for tube amplifiers | EP06019450.3 | 1998-12-04 | EP1732212A1 | 2006-12-13 | Mori, Yasuhiko; Mieda, Fumio; Mitoma, Hirofumi |
An output signal converter for tube amplifiers, being constituted by using semiconductor devices and either amplifying or attenuating output signals given from the tube amplifier having the output terminal to be supplied to the speaker while maintaining the output property of the tube amplifier comprising: |
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| 196 | Push-pull wideband semiconductor amplifier | EP98122440.5 | 1998-11-26 | EP0920125B1 | 2006-09-27 | Kakuta, Yuji; Fukasawa, Yoshiaki; Taguchi, Yuichi |
| 197 | EVEN ORDER DISTORTION ELIMINATION IN PUSH-PULL OR DIFFERENTIAL AMPLIFIERS AND CIRCUITS | EP03742201 | 2003-06-26 | EP1520396A4 | 2006-05-17 | PETROVIC BRANISLAV; NGUYEN CONG |
| A method for improving or eliminating second harmonic and higher even order distortion terms and balance of fundamental signals in push-pull amplifiers and other differential circuits is disclosed. A common-mode (CM) signal is generated as a sum of two complementary (out of phase) signals in a summation network (32). The CM signal contains even order distortion terms only, while the fundamental signal and odd order distortion terms are canceled, thus providing a correction signal that can be used to reduce even order distortion terms, by injecting the correction signal, with proper phase and amplitude, into suitable circuit nodes. For feedback (70), the correction signal is injected at the input (56, 58) of the amplifiers (16, 18), for feed-forward, it’s injected at the output. The correction signal can be amplified to higher levels and injected into the circuit, without affecting gain of fundamental signals; and can result in significant even order distortion improvements, and improved balance of complementary fundamental signals. | ||||||
| 198 | NEUTRALIZATION OF FEEDBACK CAPACITANCE IN AMPLIFIERS | EP04723287.1 | 2004-03-25 | EP1611677A1 | 2006-01-04 | VAN DER HEIJDEN, Mark |
| A transistor amplifier circuit has a current to current feedback transformer for neutralization of feedback capacitance and setting the input impedance of the amplifier. IM3 cancellation is implemented by out-of-band terminations at the input, which does not depend on the loading of the output of the amplifier. The IM3 cancellation contributes better linearity, while the capacitance neutralization contributes high and stable gain. These features are more orthogonal than other prior art techniques in terms of gain and linearity over a wide dynamic range. Hence there is less of a trade-off between the desirable properties of high gain and good linearity. Notably they can be implemented to have good efficiency and high levels of integration, which are important for many applications such as wireless transceivers for portable devices or consumer equipment. The amplifier can be a single ended or a differential common emitter amplifier. It can use GaAs HBTs for RF applications or other bipolar technologies (SiGe HBT, GaAs HBT, Si BJT). | ||||||
| 199 | Double transformer balun for maximum power transfer from power amplifier | EP04011412.6 | 2004-05-13 | EP1578014A1 | 2005-09-21 | Castaneda, Jesus A.; Li, Qiang; Rofougaran, Ahmadreza |
Double transformer balun for maximum PA (Power Amplifier) power. A novel approach is presented herein by which conversion from a differential signal to single-ended signal may be achieved using a double transformer balun design. The secondary coils of the double transformer balun also operate as a choke for the PA supply voltage. The secondary coils can operate as an RF (Radio Frequency) trap or choke to keep any AC (Alternating Current) signal components and to pass any DC (Direct Current) components. By using a double transformer balun design, relatively thinner tracks may be employed thereby ensuring a high degree of electromagnetic coupling efficiency and high performance. Also, these relatively thinner tracks consume a relatively small amount of space on the die. The double transformer balun design also includes a matching Z (impedance) block that is operable to math the Z of an antenna or line that the PA is driving. |
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| 200 | OPTICAL RECEIVER | EP97927408 | 1997-06-20 | EP0909044A4 | 2005-06-15 | MATSUMOTO KAZUYA |
| The gain deterioration of an optical receiver by the dropping of the signal source impedance on the high frequency side is compensated by inserting a frequency characteristic compensating inductor (7) between a light receiving device (1) and a bias power source (5) used therefore. The device (1) is connected to the power source (5) through the inductor (7). The resonance frequency determined by the parasitic capacitance and junction capacitance of the inductor (7) and device (1) is made nearly equal to the upper limit frequency of the frequency band of the optical receiver. Hence the signal source impedance of the device (1) is increased equivalently and the gain deterioration of the optical receiver is compensated. | ||||||
