GB604499A - Improvements in and relating to electronic amplifiers - Google Patents

Improvements in and relating to electronic amplifiers

Info

Publication number
GB604499A
GB604499A GB3475345A GB3475345A GB604499A GB 604499 A GB604499 A GB 604499A GB 3475345 A GB3475345 A GB 3475345A GB 3475345 A GB3475345 A GB 3475345A GB 604499 A GB604499 A GB 604499A
Authority
GB
United Kingdom
Prior art keywords
amplifier
circuit
resistance
gain
input
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
GB3475345A
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to GB3475345A priority Critical patent/GB604499A/en
Publication of GB604499A publication Critical patent/GB604499A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/22—Automatic control in amplifiers having discharge tubes

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

604,499. Valve amplifying circuits. BYARD, S. A., and WRIGHT, C. S. Dec. 21, 1945, No. 34753. [Class 40 (v)] An electronic amplifier comprises an automatic volume control arrangement having a circuit, the time constant of which when charging is greater than when discharging so that gain reduction on increase of amplifier input is slow compared with the recovery of gain. The circuit may be used in echo-ranging systems where a signal of short duration may be masked by the presence of noise of variable intensity. The output of amplifier 1 in Fig. 1 is applied to a rectifying device 5 to produce a negative polarizing voltage which is applied via the condenser-resistance network 7, 6, to the amplifier to effect gain control. A rectifier 8 is connected across resistanec 6 so that the resistance in the discharging circuit of condenser 7 is less than that in the charging circuit. To avoid initial delay in the operation of gain control, a negative polarizing voltage may be provided by means of battery 9, the circuit including a switch 10 which is opened when an input is applied to the amplifier. Further modifications allow for a small resistance to be connected in series with rectifier 8, or for resistance 6 to be omitted, when the control becomes effective substantially only for decreases in input amplitude.- Specification 457,614 is referred to.
GB3475345A 1945-12-21 1945-12-21 Improvements in and relating to electronic amplifiers Expired GB604499A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3475345A GB604499A (en) 1945-12-21 1945-12-21 Improvements in and relating to electronic amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3475345A GB604499A (en) 1945-12-21 1945-12-21 Improvements in and relating to electronic amplifiers

Publications (1)

Publication Number Publication Date
GB604499A true GB604499A (en) 1948-07-05

Family

ID=10369545

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3475345A Expired GB604499A (en) 1945-12-21 1945-12-21 Improvements in and relating to electronic amplifiers

Country Status (1)

Country Link
GB (1) GB604499A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597520A (en) * 1947-01-31 1952-05-20 Decca Record Co Ltd Automatic volume control circuits
US3155954A (en) * 1962-06-15 1964-11-03 Howard M Larrick Automatic sensitivity control for sound actuated detection and alarm systems
US3519948A (en) * 1966-09-29 1970-07-07 Eresa Sa Purely electronic automatic gain control for an audio amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597520A (en) * 1947-01-31 1952-05-20 Decca Record Co Ltd Automatic volume control circuits
US3155954A (en) * 1962-06-15 1964-11-03 Howard M Larrick Automatic sensitivity control for sound actuated detection and alarm systems
US3519948A (en) * 1966-09-29 1970-07-07 Eresa Sa Purely electronic automatic gain control for an audio amplifier

Similar Documents

Publication Publication Date Title
GB1279335A (en) Sound responsive device
GB853340A (en) Electric control device for the control of electric voltage or current
GB1021347A (en) Audio actuated switches
GB1533719A (en) Automatic gain control means for a single sideband radio receiver
GB604499A (en) Improvements in and relating to electronic amplifiers
US2969486A (en) Voice-operated control system
GB727433A (en) Improvements in or relating to a pulse sharpening circuit
GB773470A (en) Improvements in or relating to detector-circuit arrangements
GB653852A (en) Pulse-width demodulator
GB903436A (en) Voltage amplitude detector circuit arrangement
GB708983A (en) Improvements in or relating to saw-tooth amplifier circuits
GB1073206A (en) Improvements in or relating to amplifier circuit arrangements
GB565638A (en) Improvements relating to frequency dividing arrangements
GB959510A (en) Variable attenuation device
GB1091318A (en) Waveform envelope detector circuit
SU370706A1 (en) FOSTER 11L? NTNO-.Lp ^^ 1E ~ W
US2543807A (en) Voice operated relay
GB632370A (en) Signal transmission systems incorporating volume limiters
SU748801A1 (en) Automatic amplification regulator
GB888995A (en) Improvements in and relating to variable-gain electric signal amplifiers
GB590824A (en) Automatic tone controlling circuit arrangement for radio or like systems
GB613530A (en) Thermionic tube amplifier automatic regulating system
GB634088A (en) Improvements in negative feed-back amplifiers
SU367528A1 (en) TRIGGER DEVICE
GB808891A (en) Test equipment for a radar set