| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | Bi-directional amplifier | JP18581882 | 1982-10-22 | JPS5974715A | 1984-04-27 | SASANO NAKAMICHI |
| PURPOSE: To perform the stable working of a bi-directional amplifier without deteriorating the amplification degree by using a negative impedance to connect two signal sources showing approximate natures as loads and then using these two signal sources with each other as the loads for the negative impedance conversion. CONSTITUTION: Signal source impedances 38 and 48 are connected to signal sources 30 and 40 respectively of a bi-directional amplifier, and line impedances 39 and 49 are used to connect the sources 30 and 40 and a negative impedance 45. The impedance 45 has a structure of a 4-terminal circuit containing terminals a∼d and contains an operational amplifier 50 having differential input terminals 51 and 52 connected to terminals (a) and (b). Thus a negative impedance converter is obtained. Then the sources 30 and 40 are used mutually as a load for negative impedance conversion to each other. This secures the stable working of a bi-directional amplifier with no deterioration of amplification degree. COPYRIGHT: (C)1984,JPO&Japio | ||||||
| 82 | JPS5716526B2 - | JP729973 | 1973-01-16 | JPS5716526B2 | 1982-04-06 | |
| 83 | Amplification system | JP13001278 | 1978-10-24 | JPS5556709A | 1980-04-25 | SHIBATA MAKOTO |
| PURPOSE:To prevent a bistable multivibrator from causing swinging through amplification by frequencies. CONSTITUTION:Terminals 1 and 2 are connected to telephone main wires, filters 3 and 11, 13 and 24, and 25 and 35 are equal in kind respectively, and signals having passed through respective filters are amplified by passing through corresponding amolifiers 10 and 9, 22 and 21, and 33 and 34. Then, when a rectified signal from amplifier 14 is greater than that from amplifier 15, photocoupler 12 operates to send a signal from terminal 1 to terminal 2 by way of filter 13, amplifier 22 and filter 24, but a signal from terminal 2 is not sent to terminal through the operations of diode switches 7, 18 and 32. | ||||||
| 84 | Amplifying system | JP11135478 | 1978-09-12 | JPS5538745A | 1980-03-18 | SHIBATA MAKOTO |
| PURPOSE:To eliminate the effect of the noise by providing the signal attenuation part at the two-line part in the two-way amplifying system and thus securing distinction which side the signal comes from. CONSTITUTION:In case the speaker at the connecting destination of main wire 2 has a small amount of attenuation with a large amount of the ambient noise and the attenuation given from the speaker to be connected to main wire 1 is large, the voltage of amplifier 21 exceeds the voltage of amplifier 20 due to the noise with contacts 24 and 25 opened at all times. In such case, a sufficiently large amount is secured for resistance 28 provided at the two-line part, and as a result the output characteristics of amplifiers 20 and 21 is adjusted to eliminate the effect of the noise. In addition, the speaker of main wire 1 carries the specific signal generator with him, and then transmits the specific signal to operate relay switches 30-33 via tuning circuit 44 and amplifier 29. Thus the malfunction due to the noise can be eliminated. | ||||||
| 85 | Negative impedance repeater with equalization function | JP15271676 | 1976-12-17 | JPS5376609A | 1978-07-07 | INAO KIYOHARU |
| PURPOSE:To simplify its fabrication and adjustment by realizing an equalization function with the use of a RC element in a negative impedance repeater of wideband signal transmission. | ||||||
| 86 | Two-way digital amplifier circuit | JP7068676 | 1976-06-14 | JPS52153313A | 1977-12-20 | INA YASUNOBU |
| PURPOSE:To achieve a two-way signal transmission through a simple logical circuit using a pair of digital amplifiers and NOR gates. | ||||||
| 87 | Bidirectional amplifier | JP6619276 | 1976-06-07 | JPS52149415A | 1977-12-12 | TAKAHASHI KENZOU |
| PURPOSE:To realize a large amplitude gain and stable operation, by formint the negative feedback amplifying circuit to the two signals commonly use of a line and making inverse transmission, thru a pair of addition amplifying circuit and six passive impedances. | ||||||
| 88 | Relay transmission at time dividing 2-lines type all communication | JP464876 | 1976-01-20 | JPS5289015A | 1977-07-26 | KAMATA KOUZOU |
| PURPOSE:To take off the limitation of transmission distance by providing the relay device that causes pulses in both directions to cross each other on the way. | ||||||
| 89 | JPS4883750A - | JP729973 | 1973-01-16 | JPS4883750A | 1973-11-08 | |
| 90 | 電力増幅器、電力増幅方法、ならびに電力増幅制御装置および方法 | JP2018502204 | 2015-07-28 | JP2018521592A | 2018-08-02 | スン、ジェ; ズン、ジィション; ウ、ションボ |
| 本発明の実施形態は、電力増幅器の分野に関し、電力増幅器、電力増幅方法、ならびに電力増幅制御装置および方法を提供する。電力増幅器は、並列に接続されているn個のドハティ電力増幅ユニットと、nウェイアウトフェージングコンバイナとを含み、n≧2であり、かつ、nは整数であり、各ドハティ電力増幅ユニットは、1つの入力端および1つの出力端を含み、nウェイアウトフェージングコンバイナは、n個の入力端および1つの出力端を含み、ドハティ電力増幅ユニットの出力端は、nウェイアウトフェージングコンバイナの入力端に別々に接続されている。本発明において、この構造を有する電力増幅器によって、高効率性がより大きい入力電力変動範囲内に維持でき、それにより、さらに消費電力を低減する。 | ||||||
| 91 | Semiconductor amplifier circuit and system | JP2000558602 | 1999-07-06 | JP3537395B2 | 2004-06-14 | 博 木村; 錠二 林 |
| 92 | Communication equipment for vehicle | JP1716297 | 1997-01-30 | JPH10215270A | 1998-08-11 | OUCHI KATSUHIRO; SATOU MORIO |
| PROBLEM TO BE SOLVED: To provide a communication equipment for vehicle suitable for high speed communication in which distortion in signals is small. SOLUTION: This communication equipment 1 for vehicle is provided with charge discharge means 23, 24 that discharge electric charges stored in a distributed capacitance of a signal line 5 by bypassing a pull-up resistor RL or charge the electric charges to the distributed capacitance of the signal line 5 by bypassing the pull-up resistor RL, and the charge discharge means 23, 24 discharge/ charge electric signals only for a prescribed period shorter than a time equivalent to one-bit length of a signal when transistors(TRs) Q1, Q3 are switched from ON to OFF, and the prescribed period is selected longer than a switching time when a reception means 25 that obtains a reception signal from a signal line 5 in a node connected via the signal line 5 is switched ON to OFF or vice versa. | ||||||
| 93 | Multi-stage variable gain amplifier circuit | JP7709696 | 1996-03-29 | JPH09270650A | 1997-10-14 | IGARASHI SADAO; AOKI KAZUHARU; URABE SATORU |
| PROBLEM TO BE SOLVED: To reduce the current consumption in the multi-stage variable amplifier circuit and to improve the linearity at an input intercept point and the gain. SOLUTION: The multi-stage amplifier circuit is configured by a constant current variable amplifier circuit 1 amplifying an input signal and current variable amplifier circuits 2, 3 amplifying further the signal amplified by the 1st variable amplifier circuit. An AGC voltage AGC is applied in common between a base and an emitter of an amplification factor control transistor(TR) Q14 of the constant current variable amplifier circuit 1 and between bases and emitters of amplification factor control TRs Q15, Q16 of the current variable amplifier circuits 2, 3, and collector currents of the TRs Q14, Q15, Q16 change exponentially with respect to the AGC voltage AGC changing linearly. A current proportional to a collector current of the TR Q14 flows to TRs Q1, Q4 and the gain PD (dB) of the constant current variable amplifier circuit 1 changes linearly with respect to the AGC voltage AGC. COPYRIGHT: (C)1997,JPO | ||||||
| 94 | Variable gain amplifier | JP28914094 | 1994-10-28 | JPH08130428A | 1996-05-21 | SASAKI KAZUJI; KATAKURA MASAYUKI; SAIJO KAZUYUKI |
| PURPOSE: To secure a wide input dynamic range and to obtain low noise characteristics. CONSTITUTION: First and second variable gain amplifier circuits 2 and 3 of respectively different noise characteristics and saturation input levels are parallelly arranged to apply the same input signal S10. Thus, the noise characteristics and the characteristics of saturation input levels can be obtained corresponding to the level of the input signal S10 so that the wide input dynamic range can be secured and the low noise characteristics can be obtained. COPYRIGHT: (C)1996,JPO | ||||||
| 95 | Interface circuit | JP24959994 | 1994-10-14 | JPH07263982A | 1995-10-13 | CORDINI PAOLO; PEDRAZZINI GIORGIO; ROSSI DOMENICO |
| PURPOSE: To obtain an effective interface by providing an integrated circuit which operates with a low-voltage and a high-voltage input signal and outputs a high-voltage or low-voltage signal corresponding to them. CONSTITUTION: Cutoff circuit block 4 inhibits a 1st amplifying circuit block 2 from becoming conductive when a high-voltage output terminal operates as an input terminal. Consequently, any high-voltage signal applied to the high- voltage output terminal B operates on only a 2nd amplification block 3. A 2nd amplifying circuit block 3, on the other hand, consists of a power element which operates with a high voltage, withstands high-voltage input, and outputs a low-voltage signal. For the application of this interface circuit 1 to an industrial control unit, the 1st amplifying circuit block 2 operates relatively to an actuator, but the 2nd amplifying circuit block 3 operates relatively to a microcontroller. This block 2 can be powered directly by the same power source with the actuator and the block 3 can share a low-voltage power source with the microcontroller. COPYRIGHT: (C)1995,JPO | ||||||
| 96 | High frequency bidirectional amplifier | JP33347090 | 1990-11-29 | JPH03188705A | 1991-08-16 | TOSHIKAZU TSUKII; ESU JIIN HOUN; MANFURETSUDO JIEI SHIYUINDORAA |
| PURPOSE: To provide a symmetrical and bidirectional distribution amplifier by setting up equal electric path length in a corresponding state through respective transistors(TRs) between the input terminal of a 1st signal line and an individual output terminal and between the input electrode of a 2nd signal line and an output electrode. CONSTITUTION: In the length of a transmission line 30c from a line AA, the first half of the line is 1g 3/2 electric path length and the latter half is brached so as to have the same electric path length as 1g 3/2. The succeeding pair parts 30b, 30d of the trnasmission line have the same length 1g 2 and the succeeding pair parts 30a, 30e have the same electric path length 1g 1. An output propagation network is symmetrical about the line AA and a transmission line 32c from the line AA has a pair of 1/2 electric path length elements 1d 3/2 having the same length. A signal sent from a terminal 16 through field effective transistors FET1 to FET4 is propagated along an electric path having the same electric path length when the signal is sent from a terminal 16b to a terminal 16d. COPYRIGHT: (C)1991,JPO | ||||||
| 97 | Echo canceller type twp-way amplifier | JP18418784 | 1984-09-03 | JPS6162217A | 1986-03-31 | MARUYAMA TADASUKE; FUDA HITOSHI; YASUKAWA HIROSHI; SHIMADA MASAHARU |
| PURPOSE:To attain talking even before the identification of an echo canceller is finished by constituting a gain control circuit of a variable gain amplifier with a cancellation amount detecting circuit, a superior and interior gain control circuits and a voice superior detection circuit so as to activate a high speed response AGC of the amplifier as soon as the line is connected. CONSTITUTION:Cancellation amount detecting circuits 50, 51 of a gain control circuit 40 obtain an echo cancellation amount ERL as ERL=PR1-PSO from the levels PSO, PR1 of a transmission output signal and a reception input signal of the echo cancellers 20, 21. A superior gain control circuit 60 obtains a smaller gain in gains G1, G2 obtained from amplifiers 30, 31 as a superior gain GV. An inferior gain control circuit 70 obtains an inferior gain GNV as GNV+ GV-ERL1-ERL2<-m (where m is a ring tone margin). Further, a smaller gain in the GV and (ERL1+ERL2-GV-m) is selected as the inferior gain GNV. Then the voice superiority detection circuit 80 detects and compares the level of the input signal to the amplifiers 30, 31, gives the gain GV to the superior amplifier decided to have a large sound volume and gives the gain GNV to the inferior amplifier having smaller sound volume. | ||||||
| 98 | Two-way amplifier | JP12436284 | 1984-06-16 | JPS613510A | 1986-01-09 | KARASAWA TSUTOMU |
| PURPOSE:To prevent oscillation of a two-way amplifier using a hybrid transformer by constituting the amplifier section of said two-way amplifier in the order of a high-pass filter, an amplifier and a low-pass filter. CONSTITUTION:After a signal from the hybrid transformer is amplified by an amplifier 11 via a bypass filter 9 cutting off a desired low frequency band and passing a high frequency band in the two-way amplifier amplifying and transmitting the input signal via the hybrid transformer, the result is transmitted via a low-pass filter 12 cutting off a desired high frequency band and passing a low frequency band. Thus, the device is constituted by cutting off an unnecessary frequency band causing oscillation and the stable two-way amplifier without oscillation is obtained. | ||||||
| 99 | JPS609365B2 - | JP15271676 | 1976-12-17 | JPS609365B2 | 1985-03-09 | INAO KYOHARU |
| 100 | JPS552082B2 - | JP6875475 | 1975-06-06 | JPS552082B2 | 1980-01-18 | |
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