GB1467059A – Stabilized amplifier
– Google Patents
GB1467059A – Stabilized amplifier
– Google Patents
Stabilized amplifier
Info
Publication number
GB1467059A
GB1467059A
GB2124674A
GB2124674A
GB1467059A
GB 1467059 A
GB1467059 A
GB 1467059A
GB 2124674 A
GB2124674 A
GB 2124674A
GB 2124674 A
GB2124674 A
GB 2124674A
GB 1467059 A
GB1467059 A
GB 1467059A
Authority
GB
United Kingdom
Prior art keywords
amplifier
transistors
emitter
transistor
collector
Prior art date
1973-05-24
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2124674A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1973-05-24
Filing date
1974-05-14
Publication date
1977-03-16
1974-05-14
Application filed by RCA Corp
filed
Critical
RCA Corp
1977-03-16
Publication of GB1467059A
publication
Critical
patent/GB1467059A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03F—AMPLIFIERS
H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03F—AMPLIFIERS
H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
H03F1/307—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in push-pull amplifiers
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03F—AMPLIFIERS
H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03F—AMPLIFIERS
H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03F—AMPLIFIERS
H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
H03F3/3081—Duplicated single-ended push-pull arrangements, i.e. bridge circuits
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03F—AMPLIFIERS
H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
H03F3/45—Differential amplifiers
H03F3/45071—Differential amplifiers with semiconductor devices only
Abstract
1467059 Transistor amplifiers RCA CORPORATION 14 May 1974 [24 May 1973] 21246/74 Heading H3T The invention relates to an amplifier of the type comprising four transistors or compound transistors arranged in bridge formation. In the embodiment the compound transistors are 41, 42, 43 and 44 in each of which the commoned collectors are the equivalent emitter, the commoned emitters are the collector and the base is that of the common emitter input transistor. According to the invention a phase-splitter 201-204 and 251-253 provides a high impedance and sole source of quiescent bias and drive and a differential amplifier 50 provides negative feedback of at least the quiescent potential across the load. The embodiment is an integrated circuit in which the NPN transistors are vertical structures and the PNP of the lateral type. Input terminal T1 is coupled to an input amplifier 10 comprising an emitter coupled pair, which feeds a Darlington pair common collector stage 11, 12 followed by a common emitter stage 13. The amplified signal is applied to a peak-to-peak limiting amplifier 15, the output of which is fed to two phase-splitters 20, 25 which drive composite output transistors 41, 42 and 43, 44 respectively. The antiphase output voltages at terminals T2, T3 are combined in a differential amplifier 50 to provide a local negative feedback signal to the inputs of phasesplitters 20, 25 and also in a second differential amplifier 60 to provide an overall negative feedback signal applied to the input amplifier 10. A series RC network is provided external to the integrated circuit, between terminals T8, T9 to stabilize the feedback loop, while further stabilization is provided by an external capacitor connected between terminal T7 and earth. The composite output transistors 41-44 are provided with quiescent base currents from the collectors of transistors 202, 204, 253, 252 respectively which act as current sources so that the gains of the output transistors depend on the #’s, which are very little temperature. sensitive: the arrangement is self-compensating for high or low #’s, since this is inversely proportional to the temperature developed by internal dissipation in each transistor. The phase-splitters 20, 25 are so biased by bias network 30 as to produce quiescent base currents in output transistors 41-44 which vary inversely with the mean # of these output transistors, which facilitates reduction of cross-over distortion while maintaining the internal dissipation a minimum. Feedback amplifiers.-The negative feedback is purely differential, there being no common mode feedback to interfere with the composite output transistors 40-44 seeking to adjust their dissipation levels to be substantially equal. Amplifier 50 could comprise an emitter coupled pair with a constant current source as common emitter load, a current mirror amplifier providing collector loads, and with emitter degeneration resistors to increase the usuable signal amplitude. The preferred arrangement shown requires a pair of matched resistors 504, 505 and a current mirror amplifier 501, 502: when terminals T2, T3 are at the same potential the collector voltage of transistor 502, like that of transistor 501, and connection to the diodeconnected transistors 201, 251 does not disturb the state of the phase-splitters 20, 25. Amplifier 60 is similar, but modified to provide the higher quiescent bias required by transistor 102 of input amplifier 10: the modifications include equal emitter circuit resistors 603, 604, while due to feedback over emitter-follower 605 the collector to emitter voltages of transistors 601, 602 is 2V BE . The arrangement of the limiting amplifier 15, further limiter diodes and temperature control network 70 is described in Specification No. 1,467,057 and the bias network 30 in co-pending application 21237/74.
GB2124674A
1973-05-24
1974-05-14
Stabilized amplifier
Expired
GB1467059A
(en)
Applications Claiming Priority (2)
Application Number
Priority Date
Filing Date
Title
US36363073A
1973-05-24
1973-05-24
US05/553,634
US3983502A
(en)
1973-05-24
1975-02-27
Bridge-output amplifier with direct-coupled differential-mode feedback
Publications (1)
Publication Number
Publication Date
GB1467059A
true
GB1467059A
(en)
1977-03-16
Family
ID=27002143
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2124674A
Expired
GB1467059A
(en)
1973-05-24
1974-05-14
Stabilized amplifier
Country Status (9)
Country
Link
US
(1)
US3983502A
(en)
JP
(1)
JPS5436819B2
(en)
BE
(1)
BE815521A
(en)
CA
(1)
CA1024222A
(en)
DE
(1)
DE2424813B2
(en)
FR
(1)
FR2231151B1
(en)
GB
(1)
GB1467059A
(en)
NL
(1)
NL7406717A
(en)
SE
(1)
SE404115B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4321428A
(en)
*
1978-11-24
1982-03-23
Hitachi, Ltd.
Acoustic monolithic power semiconductor integrated circuit and acoustic system using the same
Families Citing this family (16)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS5942487B2
(en)
*
1975-08-06
1984-10-15
日本電気株式会社
Active double balanced modulator/demodulator
US4081757A
(en)
*
1976-11-19
1978-03-28
Altec Corporation
Parallel power amplifier circuits
US4180782A
(en)
*
1978-06-05
1979-12-25
Rca Corporation
Phantom full-bridge amplifier
US4283683A
(en)
*
1979-05-29
1981-08-11
Motorola Inc.
Audio bridge circuit
US4403198A
(en)
*
1981-03-27
1983-09-06
General Electric Company
Biasing circuit for MOSFET power amplifiers
IT1168164B
(en)
*
1981-08-26
1987-05-20
Ates Componenti Elettron
BRIDGE FINAL STAGE FOR AN AUDIO RECEPTION APPLICATOR
JPS5862910A
(en)
*
1981-10-08
1983-04-14
Pioneer Electronic Corp
Amplifying circuit
US4672664A
(en)
*
1985-12-16
1987-06-09
Gte Communication Systems, Inc.
Telephone line monitor amplifier
IT1243920B
(en)
*
1990-11-20
1994-06-28
Sgs Thomson Microelectronics
HIGH EFFICIENCY AUDIO POWER AMPLIFIER COMPOSED OF TWO AMPLIFIERS WITH A SINGLE POWER SUPPLY.
US5229721A
(en)
*
1992-04-06
1993-07-20
Plantronics, Inc.
Micropower amplifier/transducer driver with signal expansion
NO301098B1
(en)
*
1996-07-22
1997-09-08
Dynamic Precision
Power Amplifier
US5973564A
(en)
*
1998-04-02
1999-10-26
Burr-Brown Corporation
Operational amplifier push-pull output stage with low quiescent current
KR100879436B1
(en)
2005-08-05
2009-01-20
마이크렐 인코포레이티드
Zero cancellation in multiloop regulator control scheme
US7323854B2
(en)
*
2005-08-05
2008-01-29
Micrel, Incorporated
Zero cancellation in multiloop regulator control scheme
EP2784934B1
(en)
*
2013-03-25
2020-09-23
Dialog Semiconductor B.V.
Electronic biasing circuit for constant transconductance
US11735902B2
(en)
2020-03-24
2023-08-22
Analog Devices International Unlimited Company
Bipolar junction transistor heater circuit
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3212019A
(en)
*
1961-09-18
1965-10-12
Omega Electronics Corp
Bridge power amplifier with linearizing feedback means
US3445776A
(en)
*
1966-12-19
1969-05-20
Rca Corp
Phase splitting circuit for a direct coupled push-pull amplifier
GB1329090A
(en)
*
1969-11-04
1973-09-05
Plessey Co Ltd
Electrical amplifier arrangements
US3808545A
(en)
*
1972-10-04
1974-04-30
Int Radio & Electronics Corp
High power bridge audio amplifier
1974
1974-05-14
GB
GB2124674A
patent/GB1467059A/en
not_active
Expired
1974-05-17
CA
CA200,223A
patent/CA1024222A/en
not_active
Expired
1974-05-20
NL
NL7406717A
patent/NL7406717A/xx
not_active
Application Discontinuation
1974-05-21
SE
SE7406750A
patent/SE404115B/en
unknown
1974-05-21
FR
FR7417568A
patent/FR2231151B1/fr
not_active
Expired
1974-05-22
DE
DE19742424813
patent/DE2424813B2/en
active
Granted
1974-05-23
JP
JP5865674A
patent/JPS5436819B2/ja
not_active
Expired
1974-05-24
BE
BE144738A
patent/BE815521A/en
unknown
1975
1975-02-27
US
US05/553,634
patent/US3983502A/en
not_active
Expired – Lifetime
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4321428A
(en)
*
1978-11-24
1982-03-23
Hitachi, Ltd.
Acoustic monolithic power semiconductor integrated circuit and acoustic system using the same
Also Published As
Publication number
Publication date
BE815521A
(en)
1974-09-16
CA1024222A
(en)
1978-01-10
DE2424813B2
(en)
1977-05-26
AU6895974A
(en)
1975-11-20
SE404115B
(en)
1978-09-18
FR2231151A1
(en)
1974-12-20
FR2231151B1
(en)
1978-08-11
JPS5436819B2
(en)
1979-11-12
JPS5021656A
(en)
1975-03-07
NL7406717A
(en)
1974-11-26
DE2424813A1
(en)
1974-12-19
US3983502A
(en)
1976-09-28
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Legal Events
Date
Code
Title
Description
1977-07-27
PS
Patent sealed [section 19, patents act 1949]
1982-12-15
PCNP
Patent ceased through non-payment of renewal fee
