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1. 发明专利

JP2021108438A 楽音信号の増幅器审中-公开
公开(公告)号：JP2021108438A
公开(公告)日：2021-07-29
申请号：JP2019239930
申请日：2019-12-27
申请人：ローランド株式会社
发明人：志田光男 , 森本善信 , 高田剛右
IPC分类号： H03F3/18 , H04R3/00 , H03F3/181 , H03G3/20 , H03F3/20
摘要：【課題】電源電圧を超える楽音信号の波形を出力可能な増幅器を提供する。【解決手段】増幅器は、電源と、楽音信号の入力端子と、電源を用いて楽音信号を増幅する増幅回路と、増幅回路の出力端に接続され、電源の電圧値を超える波形を出力する跳ね上げ回路と、を含む。【選択図】図1

2. 发明专利

JP3906709B2 Amplification circuit, noise reduction device and power conversion equipment 有权
公开(公告)号：JP3906709B2
公开(公告)日：2007-04-18
申请号：JP2002049302
申请日：2002-02-26
申请人：サンケン電気株式会社
发明人：守鶴谷
IPC分类号： H02M3/28 , H02M1/12 , H03F3/18

3. 发明专利

JP2003229725A OPERATIONAL AMPLIFIER CIRCUIT, DRIVE CIRCUIT, AND METHOD OF CONTROLLING THE AMPLIFIER CIRCUIT 审中-公开
公开(公告)号：JP2003229725A
公开(公告)日：2003-08-15
申请号：JP2002026558
申请日：2002-02-04
申请人： SEIKO EPSON CORP
发明人： MAKI KATSUHIKO
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36 , H03F1/02 , H03F3/18 , H03F3/30 , H03F3/45
摘要： PROBLEM TO BE SOLVED: To provide an operational amplifier circuit that can make class AB operations, etc., with low power consumption, and to provide a drive circuit using the amplifier circuit and a method of controlling the amplifier circuit. SOLUTION: The operational amplifier circuit includes a differential section 10, an output section 30 having drive transistors PT15 and NT15, and a voltage setting circuit 20 which sets a programming voltage to a node N1. The amplifier circuit also includes a capacitance element C1. The circuit sets the programming voltage to the node N1, and thereafter, transmits the voltage change at the output node NQ1 of the differential section 10 to the node N1 by means of the capacitance element C1. Before the programming voltage is set to the node N1, switching elements SW1 and SW2 are turned off, and after the voltage is set, the elements SW1 and SW2 are turned on. The programming voltage (VDD-VTH) is set to the node N1, by setting a voltage VSS to the node N1 by turning on a switching element SW4, and thereafter, turning on a switching element SW3. The programming voltage is set during a scanning period switching period. COPYRIGHT: (C)2003,JPO

4. 发明专利

JP2001519108A 失效
公开(公告)号：JP2001519108A
公开(公告)日：2001-10-16
申请号：JP54221598
申请日：1998-02-05
IPC分类号： H03G5/16 , H03F3/18 , H03G3/30 , H03G3/32 , H03G5/00 , H03G9/00 , H04H60/47 , H04H60/73

5. 发明专利

JPH11225027A ANALOG INVERTIBLE AMPLIFIER CIRCUIT 失效
公开(公告)号：JPH11225027A
公开(公告)日：1999-08-17
申请号：JP4133398
申请日：1998-02-06
申请人： KOKUSAI ELECTRIC CO LTD
发明人： HONMA MASAHITO , HIGUCHI HIROSHI
IPC分类号： H03F3/18
摘要： PROBLEM TO BE SOLVED: To prevent oscillation without increasing the lowering of an operation frequency and the increase of power consumption by providing a small- capacitance capacitor whose one terminal is connected to an inverter part input terminal and the other terminal of which is connected to a circuit part for keeping a fixed potential. SOLUTION: A small-capacitance capacitor for preventing oscillation Cfl of a comparatively small capacitance is connected between a floating node Fn, which makes the connecting point of one terminal of an input capacitor Ci the other terminal of which is connected to an analog input terminal 2, one terminal of a feedback capacitor Cf the other terminal of which is connected to an output terminal 3, etc., and the inverter part input terminal, etc., of a three-stage inverter part 1, and the ground. Namely, most of such high frequency components as induces oscillation is removed by flowing to the ground at the step of a fine amplitude voltage before amplification to reduce the capacitance of a capacitor to utilize for this removing. Thereby, the capacitance of a capacitor for preventing oscillation Cl, which has been connected to the output side of the inverter 1, can be reduced or eliminated.

6. 发明专利

JPH11136048A BTL AMPLIFIER CIRCUIT 失效
公开(公告)号：JPH11136048A
公开(公告)日：1999-05-21
申请号：JP30056397
申请日：1997-10-31
申请人： SANYO ELECTRIC CO
发明人： KOKUBO KENICHI , TAIRA TAKAYUKI , TAYA KOJI
IPC分类号： H03F3/68 , H03F3/18 , H03F3/30
摘要： PROBLEM TO BE SOLVED: To make a BTL amplifier circuit attain a high output. SOLUTION: When 1st and 4th output transistors 15 and 18 are turned on, the voltage of a connection point of 1st and 2nd drive transistors 19 and 20 drops, and when 2nd and 3rd output transistors 16 and 17 are turned on, the voltage of a connection point of 3rd and 4th drive transistors 21 and 22 drops. Because of that, voltage difference between collectors and emitters of 1st and 2nd input transistors 2 and 3 and 1st and 2nd current source transistors 13 and 14 is expanded and prevents the transistors 13 and 14 from being saturated. Because a resistance is connected between the connection point of the vertical output transistors and the connection point of the vertical drive transistors which has an opposite phase relation to them, a current is limited and oscillation is prevented.

7. 发明专利

JP2856917B2 失效
公开(公告)号：JP2856917B2
公开(公告)日：1999-02-10
申请号：JP52202096
申请日：1996-01-11
申请人： ERU DEI TEI GMBH UNTO CO REEZAA DEISUPUREE TEKUNOROGII KG
发明人： RYUFURAA DEIRUKU
IPC分类号： H03F3/26 , H03F3/18 , H03F3/187 , H03F3/30 , H03F3/68
摘要： PCT No. PCT/EP96/00108 Sec. 371 Date Sep. 12, 1996 Sec. 102(e) Date Sep. 12, 1996 PCT Filed Jan. 11, 1996 PCT Pub. No. WO96/22631 PCT Pub. Date Jul. 25, 1996In an amplifier which generates an output voltage which is proportional to an input voltage and can be picked off between the outputs of two push-pull output stages and has peak-to-peak values of up to twice the supply voltage of the push-pull output stages, each push-pull output stage is driven by a differential amplifier having a positive and a negative differential input in each instance and whose polarity is so defined that the outputs of the two push-pull output stages have voltages of like polarity when identical voltages are present between the positive and negative differential inputs of the two differential amplifiers, a differential input of one differential amplifier being connected with a differential input of like polarity of the other differential amplifier. The remaining two differential inputs of the differential amplifiers are provided for applying a voltage proportional to the input voltage.

8. 发明专利

JP2789083B2 失效
公开(公告)号：JP2789083B2
公开(公告)日：1998-08-20
申请号：JP29806495
申请日：1995-11-16
申请人： RIIRANDO SUTANFUOODO JUNIA UNIV
发明人： HAABAATO JON SHO , MISHERU JEI EFU DEIGONE
IPC分类号： G02B6/00 , G02B6/26 , G02B6/28 , G02F1/17 , G02F1/313 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/091 , H01S3/0933 , H01S3/094 , H01S3/10 , H01S3/23 , H03F3/08 , H03F3/18 , H04B10/17

9. 发明专利

JPH06506577A 失效
公开(公告)号：JPH06506577A
公开(公告)日：1994-07-21
申请号：JP50798392
申请日：1992-04-11
IPC分类号： H03F3/18 , H03F3/30 , H03F3/50

10. 发明专利

JPH05218760A INVERSION-COUPLED CURRENT APPLYING PUSH-PULL AMPLIFIER TRANSMITTING WIDE-BAND AC SIGNAL 失效
公开(公告)号：JPH05218760A
公开(公告)日：1993-08-27
申请号：JP24515192
申请日：1992-09-14
申请人： NOKIA DOICHIYURANTO GMBH
发明人： GERUTO RAIME
IPC分类号： H03F3/18 , H03F3/30
摘要： PURPOSE: To obtain a push-pull amplifier that has a very small input resistance and is operated over a high frequency by allowing a notch circuit to be operated at a small input resistance of several ohms. CONSTITUTION: A filter circuit 3 is placed before a push-pull amplifier 1 and includes a notch circuit 4. An output of the circuit 4 is connected to a signal input 5 of the amplifier 1 for current application purpose thereto. Since the input resistance of the amplifier 1 is as small as several ohms, the signal through the circuit 4 is ensured of not being almost attenuated. Then an output current of the circuit 4 is slightly attenuated by the downstream amplifier 1. The low input resistance is realized by interconnecting collectors of two complementary transistors(TRs) 6, 7 as a series circuit 8. Furthermore, emitters E6, E7 of the TRs are connected directly to power terminals 9, 10. Thus, an amplifier having low input resistance and operating at high frequencies is obtained.

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