GB1426089A - Amplifier protection circuitry - Google Patents

Amplifier protection circuitry

Info

Publication number
GB1426089A
GB1426089A GB5839473A GB5839473A GB1426089A GB 1426089 A GB1426089 A GB 1426089A GB 5839473 A GB5839473 A GB 5839473A GB 5839473 A GB5839473 A GB 5839473A GB 1426089 A GB1426089 A GB 1426089A
Authority
GB
United Kingdom
Prior art keywords
amplifiers
conductive
dec
voltage
signal
Prior art date
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
GB5839473A
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion Co Ltd
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.)
Filing date
Publication date
Priority claimed from JP14598372U external-priority patent/JPS49101653U/ja
Application filed by Clarion Co Ltd filed Critical Clarion Co Ltd
Publication of GB1426089A publication Critical patent/GB1426089A/en
Expired legal-status Critical Current

Links

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
    • H03F1/52—Circuit arrangements for protecting such amplifiers

Abstract

1426089 Protection of transistor amplifying circuits CLARION CO Ltd 17 Dec 1973 [21 Dec 1972] 58494/73 Headings H3T and H4J In a protection arrangement for a plurality of independent amplifiers means are provided for sensing the drive condition of the final power stages of the respective amplifiers and for providing a signal when an overdrive occurs in one of the amplifiers and further means responsive to this signal for rendering all the amplifiers inoperative. Each amplifier, e.g. U2 is provided with a resistor R in series with the output stages and when the voltage across this reaches a predetermined value a corresponding diode D 01 becomes conductive: when the voltage at the tap on potentiometer VR rises sufficiently, silicon controlled rectifier SCR becomes conductive and, via diode D 11 biases transistor Q 2 non-conductive. As a result, transistors Q 3 - Q 5 also become non-conductive, while the other amplifiers are also similarly biased non-conductive via corresponding diodes D 12 -D 14 . Switch SW enables the system to be restored to normal condition.
GB5839473A 1972-12-21 1973-12-17 Amplifier protection circuitry Expired GB1426089A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP14598372 1972-12-21
JP14598372U JPS49101653U (en) 1972-12-21 1972-12-21

Publications (1)

Publication Number Publication Date
GB1426089A true GB1426089A (en) 1976-02-25

Family

ID=26476948

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5839473A Expired GB1426089A (en) 1972-12-21 1973-12-17 Amplifier protection circuitry

Country Status (2)

Country Link
DE (1) DE2363196A1 (en)
GB (1) GB1426089A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3103852A1 (en) * 1980-02-08 1982-02-18 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa POWER AMPLIFIER
US4495638A (en) * 1978-05-17 1985-01-22 Body Sonic Kabushiki Kaisha Audio-band electro-mechanical vibration converter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0794958A (en) * 1993-09-20 1995-04-07 Pioneer Electron Corp Overload detecting circuit for power amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495638A (en) * 1978-05-17 1985-01-22 Body Sonic Kabushiki Kaisha Audio-band electro-mechanical vibration converter
DE3103852A1 (en) * 1980-02-08 1982-02-18 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa POWER AMPLIFIER

Also Published As

Publication number Publication date
DE2363196A1 (en) 1974-06-27

Similar Documents

Publication Publication Date Title
GB1381035A (en) Electrical system with current and voltage limiting-protective means
GB1285621A (en) Electronic circuit arrangement with at least one integrated circuit
GB1413824A (en) Protection device for a power amplifying semiconductor element of an integrated circuit
GB1368501A (en) Current converter switching logic circuit
GB1480532A (en) Field effect transistor amplifier
GB1426089A (en) Amplifier protection circuitry
ES405172A1 (en) Drive circuit for conducting devices
GB1412997A (en) Voltage level converter circuit
GB1447998A (en) Current supply circuit
GB1245612A (en) Function generator
GB1243836A (en) Radiation monitoring device
GB1205053A (en) Electronic control circuits
GB1476853A (en) Drive circuit
GB1461496A (en) A stable multivibrator circuit
GB1485778A (en) Signal clipping circuits
GB1170015A (en) Improvements in or relating to an Adjusting System for Universal Motors
GB1036225A (en) Improvements in or relating to electronic device for switching low-level voltage signals
GB1349275A (en) Circuit arrangement for producing pulses
FR2425150A1 (en) Protection circuit for high power transistor equipment - uses Zener diodes and resistors to limit current in each transistor independently
GB1339908A (en) Microampere current source
GB906776A (en) Improvements in or relating to transistor circuit arrangements for d.c. voltage stabilisation
GB1254669A (en) Transistor circuits
GB900088A (en) Regulated power supply for electric motors
FR2280905A2 (en) Surveillance circuit for a voltage - uses load resistance in series with transistor controlled power transistor
GB1327548A (en) Threshold voltage amplifier

Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19931216