KR950015971A - Seamos op amp - Google Patents

Seamos op amp Download PDF

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KR950015971A
KR950015971A KR1019930025326A KR930025326A KR950015971A KR 950015971 A KR950015971 A KR 950015971A KR 1019930025326 A KR1019930025326 A KR 1019930025326A KR 930025326 A KR930025326 A KR 930025326A KR 950015971 A KR950015971 A KR 950015971A
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connection node
transistor
node
channel
gate terminal
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KR1019930025326A
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KR960016343B1 (en
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이덕구
이명석
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김광호
삼성전자 주식회사
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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45Differential amplifiers
    • H03F3/45071Differential amplifiers with semiconductor devices only
    • H03F3/45076Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45179Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • H03F3/45183Long tailed pairs
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45Differential amplifiers
    • H03F3/45071Differential amplifiers with semiconductor devices only
    • H03F3/45076Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45179Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • H03F3/45273Mirror types

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

본 발명은 씨모오스 제조공정에 의해 이루어지고 차동 입/출력단을 가지는 연산증폭기에 관한 것으로, 본 발명은, 2개의 차동증폭회로가 공급전원과 바이어스노드 사이에 서로 병렬접속하고 각 차동증폭회로는 공급전원으로 통하는 각각의 전류 경로상에 하나의 능동부하트랜지스터를 각각 구비하는 차동입력단을 가지는 연산증폭기를 개시하고 있다. 이와 같이 본 발명에 의한 연산증폭기는, 2개의 차동증폭회로를 병렬접속한 차동입력단을 구성함에 의해, 전류이득과 입력의 공통모드범위가 모두 증가되는 효과가 있다.The present invention relates to an operational amplifier made by a CMOS manufacturing process and having a differential input / output stage. The present invention provides two differential amplifier circuits connected in parallel between a power supply and a bias node, and each differential amplifier circuit is supplied. An operational amplifier is disclosed having a differential input stage each having one active load transistor on each current path to the power source. As described above, the operational amplifier according to the present invention has the effect of increasing both the current gain and the common mode range of the input by configuring the differential input stage in which two differential amplifier circuits are connected in parallel.

Description

씨모오스 연산증폭기Seamos op amp

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 의한 연산증폭기의 차동입력단의 회로구성을 보여주는 실시예.Figure 2 is an embodiment showing the circuit configuration of the differential input stage of the operational amplifier according to the present invention.

Claims (11)

소정의 바이어스전압에 의채 구동되는 바이어스트랜지스터에 의해 전류량이 조절되는 바이어스노드를 가지는 연산증폭기에 있어서, 공급전원단자와 상기 바이어스노드 사이에 서로 병렬접속하고, 상기 공급전원단자로 통하는 각각의 전류경로상에 하나의 능동부하트랜지스터를 각각 포함하는 2개의 차동증폭회로로 이루어지는 차동입력단을 구비함을 특징으로 하는 연산증폭기.In an operational amplifier having a bias node whose current amount is controlled by a bias transistor driven by a predetermined bias voltage, a parallel connection is made between a supply power supply terminal and the bias node, and the respective current paths pass through the supply power supply terminal. And a differential input stage comprising two differential amplifier circuits each including one active load transistor. 제1항에 있어서, 상기 차동입력단이, 공급전원단자와 제1접속노드와의 사이에 채널이 형성되고 상기 제1접속노드에 게이트단자가 접속되는 제1능동부하트랜지스터와, 상기 공급전원단자와 제2접속노드와의 사이에 채널이 형성되고 상기 제1접속노드에 게이트단자가 접속되는 제2능동부하트랜지스터와, 상기 제1접속노드와 상기 바이어스노드와의 사이에 채널이 형성되고 제1입력신호가 게이트단자로 공급되는 제1입력트랜지스터와, 상기 제2접속노드와 바이어스노드와의 사이에 채널이 형성되고 제2입력신호가 게이트단자로 공급되는 제2입력트랜지스터와, 상기 공급전원단자와 제3접속노드와의 사이에 채널이 형성되고 제4접속노드에 게이트 단자가 접속되는 제3능동부하트랜지스터와, 상기 공급전원단자와 상기 제4접속노드와 사이에 채널이 형성되고 상기 제4접속노드에 게이트단자가 접속되는 제4능동부하트랜지스터와, 상기 제3접속노드와 바이어스노드와의 사이에 채널이 형성되고 상기 제1입력신호가 게이트단자로 공급되는 제3입력트랜지스터와, 상기 제4접속노드와 바이어스노드와의 사이에 채널이 형성되고 상기 제2입력신호가 게이트단자로 공급되는 제4입력트랜지스터를 구비함을 특징으로 하는 연산증폭기.The first active load transistor of claim 1, wherein the differential input terminal comprises: a first active load transistor having a channel formed between a supply power supply terminal and a first connection node, and a gate terminal connected to the first connection node; A channel is formed between the second connection node and a second active load transistor having a gate terminal connected to the first connection node, and a channel is formed between the first connection node and the bias node. A first input transistor through which a signal is supplied to the gate terminal, a second input transistor through which a channel is formed between the second connection node and the bias node, and a second input signal is supplied to the gate terminal, and A third active load transistor is formed between the third connection node and a gate terminal is connected to the fourth connection node, and a channel is formed between the power supply terminal and the fourth connection node. And a fourth active load transistor having a gate terminal connected to the fourth connection node, and a third input transistor having a channel formed between the third connection node and the bias node and supplied with the first input signal to the gate terminal. And a fourth input transistor having a channel formed between the fourth connection node and the bias node, wherein the second input signal is supplied to the gate terminal. 제2항에 있어서, 상기 제1 내지 제4능동부하트랜지스터가 각각 피모오스트랜지스터로 이루어짐을 특징으로 하는 연산증폭기.3. The operational amplifier of claim 2, wherein each of the first to fourth active load transistors is formed of a PMOS transistor. 제3항에 있어서, 상기 제1 내지 제4입력트랜지스터가 각각 엔모오스트랜지스터로 이루어짐을 특징으로 하는 연산증폭기.4. The operational amplifier of claim 3, wherein each of the first to fourth input transistors comprises an MOS transistor. 소정의 바이어스전압에 의해 구동되는 바이어스트랜지스터에 의해 전류량이 조절되는 바이어스노드를 가지는 연산증폭기에 있어서, 공급전원단자와 상기 바이어스노드 사이에 형성되는 4개의 전류경로와, 상기 4개의 전류경로 중 제1 및 제2전류경로상에 형성되는 제1전류미러와, 상기 4개의 전류경로 중 나머지 제3 및 제4경로상에 형성되는 제2전류미러와, 상기 제1전류미러와 바이어스노드와의 사이에 형성되고 제1 및 제2입력신호로 대응입력하는 제1입력트랜지스터쌍과, 상기 제2전류미러와 바이어스노드와의 사이에 형성되고 상기 제1 및 제2입력신호를 대응입력하는 제2입력트랜지스터쌍을 포함하는 차동입력단을 구비함을 특징으로 하는 연산증폭기.An operational amplifier having a bias node whose current amount is controlled by a bias transistor driven by a predetermined bias voltage, the current amplifier being formed between a supply power terminal and the bias node, and a first one of the four current paths. And a first current mirror formed on the second current path, a second current mirror formed on the remaining third and fourth paths among the four current paths, and between the first current mirror and the bias node. A second input transistor formed between the first input transistor pair and the second current mirror and the bias node and correspondingly inputting the first and second input signals. An operational amplifier comprising a differential input stage comprising a pair. 제5항에 있어서, 상기 제1 및 제2전류미러가, 상기 제1 및 제2입력신호의 입력에 대응하여 서로 전류흐름이 상보적으로 이루어짐을 특징으로 하는 연산증폭기.6. The operational amplifier of claim 5, wherein the first and second current mirrors are complementary to each other in response to input of the first and second input signals. 제5항에 있어서, 상기 제1전류미러가, 서로 게이트가 공통접속되는 2개의 피모오스트랜지스터로 이루어짐을 특징으로 하는 연산증폭기.6. The operational amplifier of claim 5, wherein the first current mirror comprises two PIO transistors whose gates are commonly connected to each other. 제5항에 있어서, 상기 제2전류미러가, 서로 게이트가 공통접속되는 2개의 피모오스트랜지스터로 이루어짐을 특징으로 하는 연산증폭기.6. The operational amplifier of claim 5, wherein the second current mirror comprises two PIO transistors whose gates are commonly connected to each other. 제7항 또는 제8항에 있어서, 상기 제1 및 제2입력트랜지스터쌍이 각각 엔모오스 트랜지스터로 이루어짐을 특징으로 하는 연산증폭기.10. The operational amplifier of claim 7 or 8, wherein the first and second input transistor pairs each comprise an EnMOS transistor. 바이어스노드와 접지전원과의 사이에 채널이 형성되고 바이어스전압에 의해 구동되는 바이어스트랜지스터와, 공급전원단자와 제1접속노드와의 사이에 채널이 형성되고 상기 제1접속노드에 게이트단자가 접속되는 제1능동부하트랜지스터와, 상기 공급전원단자과 제2접속노드와의 사이에 채널이 형성되고 상기 제1접속노드에 게이트단자가 접속되는 제2능동부하트랜지스터와, 상기 제1접속노드와 상기 바이어스노드와의 사이에 채널이 형성되고 제1입력신호가 게이트단자로 공급되는 제1입력트랜지스터와, 상기 제2접속노드와 바이어스노드와의 사이에 채널이 형성되고 제2입력신호가 게이트단자로 공급되는 제2입력트랜지스터와, 상기 공급전원단자와 제3접속노드와의 사이에 채널이 형성되고 제4접속노드에 게이트단자가 접속되는 제3능동부하트랜지스터와, 상기 공급전원단자와 상기 제4접속노드와 사이에 채널이 형성되고 상기 제4접속노드에 게이트단자가 접속되는 제4능동부하트랜지스터와, 상기 제3접속노드와 바이어스노드와의 사이에 채널이 형성되고 상기 제1입력신호가 게이트단자로 공급되는 제3입력트랜지스터와, 상기 제4접속노드와 바이어스노드와의 사이에 채널이 헝성되고 상기 제2입력신호가 게이트단자로 공급되는 제4입력트랜지스터와, 상기 제1접속노드와 제2접속노드와 제3접속노드와 제4접속노드에 각각 연결되고 이들 접속노드들에 걸리는 전류량에 의해 대응 출력하는 차동출력단을 구비하는 연산증폭기.A channel is formed between the bias node and the ground power supply, and a bias transistor driven by a bias voltage, a channel is formed between the supply power supply terminal and the first connection node, and a gate terminal is connected to the first connection node. A first active load transistor, a second active load transistor having a channel formed between the power supply terminal and the second connection node, and a gate terminal connected to the first connection node, the first connection node and the bias node A channel is formed between the first input transistor and the first input signal is supplied to the gate terminal, and a channel is formed between the second connection node and the bias node and the second input signal is supplied to the gate terminal. A third active load heart in which a channel is formed between the second input transistor, the power supply terminal and the third connection node, and the gate terminal is connected to the fourth connection node; A fourth active load transistor having a channel formed between the power supply terminal and the fourth connection node and having a gate terminal connected to the fourth connection node, and between the third connection node and the bias node. A fourth input transistor formed with a channel and supplied with the first input signal to the gate terminal, and a fourth channel formed between the fourth connection node and the bias node and supplied with the second input signal to the gate terminal; And an input transistor, and a differential output stage connected to the first connection node, the second connection node, the third connection node, and the fourth connection node, respectively, and correspondingly outputting the current by the amount of current applied to the connection nodes. 제10항에 있어서, 상기 차동출력단이, 상기 공급전원단자와 제5접속노드와의 사이에 채널이 형성되고 상기 제4접속노드에 게이트단자가 접속되는 제1피모오스트랜지스터와, 상기 공급전원단자와 제1출력노드와의 사이에 채널이 형성되고 상기 제3접속노드에 게이트단자가 접속되는 제2피모오스트랜지스터와, 상기 제5접속노드와 접지전원단자와의 사이에 채널이 형성되고 상기 제5접속노드에 게이트단자가 접속되는 제1엔모오스트랜지스터와, 상기 제1출력노드와 접지전원단자와의 사이에 채널이 형성되고 상기 제5접속노드에 게이트단자가 접속되는 제2엔모오스트랜지스터와, 상기 공급전원단자와 제2출력노드와의 사이에 채널이 형성되고 상기 제2접속노드에 게이트단자가 접속되는 제3피모오스트랜지스터와, 상기 공급전원단자와 제6접속노드와의 사이에 채널이 형성되고 상기 제1접속노드에 게이트단자가 접속되는 제4피모오스트랜지스터와, 상기 제6접속노드와 접지전원단자와의 사이에 채널이 형성되고 상기 제6접속노드에 게이트단자가 접속되는 제3엔모오스트랜지스터와, 상기 제2출력노드와 접지전원단자와의 사이에 채널이 형성되고 상기 제6접속노드에 게이트단자가 접속되는 제4엔모오스트랜지스터로 이루어짐을 특징으로 하는 연산증폭기.11. The apparatus of claim 10, wherein the differential output terminal comprises: a first PIO transistor, in which a channel is formed between the power supply terminal and a fifth connection node, and a gate terminal is connected to the fourth connection node; A second PIM transistor is formed between the first output node and the first connection node, and a channel is formed between the fifth connection node and the ground power supply terminal. A first ENMO transistor with a gate terminal connected to a fifth connection node, a second ENMO transistor with a channel formed between the first output node and a ground power supply terminal, and a gate terminal connected to the fifth connection node; A third PIO transistor, a channel being formed between the supply power supply terminal and the second output node, and a gate terminal connected to the second connection node, the supply power supply terminal and the sixth connection node; A channel is formed therebetween and a fourth PIM transistor is connected to the first connection node, and a channel is formed between the sixth connection node and the ground power supply terminal, and a gate terminal is formed at the sixth connection node. An operational amplifier, comprising: a third MOS transistor connected to the fourth MOS transistor; and a channel formed between the second output node and the ground power supply terminal, and a gate terminal connected to the sixth connection node. . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930025326A 1993-11-26 1993-11-26 Cmos operational amplifier KR960016343B1 (en)

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KR960016343B1 KR960016343B1 (en) 1996-12-09

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100753151B1 (en) * 2005-04-22 2007-08-30 삼성전자주식회사 Operational amplifier for output buffer and signal processing circuit using thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100753151B1 (en) * 2005-04-22 2007-08-30 삼성전자주식회사 Operational amplifier for output buffer and signal processing circuit using thereof

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