GB1137740A - Improvements in or relating to circuit arrangements for single sideband transmission systems - Google Patents

Improvements in or relating to circuit arrangements for single sideband transmission systems

Info

Publication number
GB1137740A
GB1137740A GB3299666A GB3299666A GB1137740A GB 1137740 A GB1137740 A GB 1137740A GB 3299666 A GB3299666 A GB 3299666A GB 3299666 A GB3299666 A GB 3299666A GB 1137740 A GB1137740 A GB 1137740A
Authority
GB
United Kingdom
Prior art keywords
valve
grid current
transistor
resistor
single sideband
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
GB3299666A
Inventor
Michael James Underhill
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.)
Philips Components Ltd
Original Assignee
Mullard 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
Application filed by Mullard Ltd filed Critical Mullard Ltd
Priority to GB3299666A priority Critical patent/GB1137740A/en
Publication of GB1137740A publication Critical patent/GB1137740A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F5/00—Amplifiers with both discharge tubes and semiconductor devices as amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
    • H03C1/60—Modulators in which carrier or one sideband is wholly or partially suppressed with one sideband wholly or partially suppressed

Abstract

1,137,740. Radio transmitting apparatus. MULLARD Ltd. 9 Oct., 1967 [22 July, 1966], No. 32996/66. Heading H4L. In an arrangement for limiting the grid current in the power output valve 14 of a single sideband transmitter, biased to operate in class AB1 and supplied by a driver stage 10, when the drive to the valve 14 exceeds a predetermined level the valve 14 will draw grid current from a constant potential line 20 whereby the current through resistor 16 will bias the emitter base junction of transistor 18 so that the transistor conducts. The collector of the transistor is coupled via resistor 21 to the grid of a valve in a preceding amplifier to affect the bias whereby the signal passed by this amplifier to the driver stage is reduced and the valve 14 ceases to draw excessive grid current. A diode 22 may be connected across the resistor 16 to prevent reverse grid current from damaging the valve 14.
GB3299666A 1966-07-22 1966-07-22 Improvements in or relating to circuit arrangements for single sideband transmission systems Expired GB1137740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3299666A GB1137740A (en) 1966-07-22 1966-07-22 Improvements in or relating to circuit arrangements for single sideband transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3299666A GB1137740A (en) 1966-07-22 1966-07-22 Improvements in or relating to circuit arrangements for single sideband transmission systems

Publications (1)

Publication Number Publication Date
GB1137740A true GB1137740A (en) 1968-12-27

Family

ID=10347125

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3299666A Expired GB1137740A (en) 1966-07-22 1966-07-22 Improvements in or relating to circuit arrangements for single sideband transmission systems

Country Status (1)

Country Link
GB (1) GB1137740A (en)

Similar Documents

Publication Publication Date Title
GB766744A (en) Semi-conductor signal receiving system
GB1279029A (en) Radar apparatus
GB1480528A (en) Rectifier circuits
GB1366271A (en) Signal control circuit
GB1472670A (en) Differential amplifier
GB1469990A (en) Gain control circuit
GB1137740A (en) Improvements in or relating to circuit arrangements for single sideband transmission systems
GB1151285A (en) Variable Attenuation Circuit
GB1216298A (en) Audio level clipper and compressor
US3013148A (en) Automatic transmitter gain control circuit
US3177377A (en) Automatic signal level discriminator
GB1460569A (en) Amplifier having constant current consumption
GB1343307A (en) Feedback clipper
GB984588A (en) Squelch circuit
GB1474071A (en) Constant-voltage circuit
US3753121A (en) Variably biased audio amplifier
GB1215324A (en) A transistor a.c. amplifier circuit
GB1372794A (en) Automatic gain control circuits
US3666969A (en) Device for clipping electrical signals
GB1106847A (en) Improvements in or relating to transistor amplifying circuits
GB1174803A (en) Amplifier
GB1351711A (en) Automatic bias controlled amplifier circuit
GB685478A (en) Improvements in or relating to thermionic valve amplifiers
GB1190185A (en) Light Sensitive Circuit Arrangements
ES348619A1 (en) Signal translating system providing amplification and limiting