GB868018A - Improvements in or relating to means for the attenuation of ripple voltages in direct-current circuits - Google Patents

Improvements in or relating to means for the attenuation of ripple voltages in direct-current circuits

Info

Publication number
GB868018A
GB868018A GB732959A GB732959A GB868018A GB 868018 A GB868018 A GB 868018A GB 732959 A GB732959 A GB 732959A GB 732959 A GB732959 A GB 732959A GB 868018 A GB868018 A GB 868018A
Authority
GB
United Kingdom
Prior art keywords
condenser
feedback
resistor
network
amplifier
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
GB732959A
Inventor
Eric John Hook
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.)
Danks Holding Ltd
Original Assignee
Bailey Meters and Controls 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 Bailey Meters and Controls Ltd filed Critical Bailey Meters and Controls Ltd
Priority to GB732959A priority Critical patent/GB868018A/en
Publication of GB868018A publication Critical patent/GB868018A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/005—Reducing noise, e.g. humm, from the supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H02M1/15—Arrangements for reducing ripples from dc input or output using active elements

Abstract

868,018. Valve amplifying circuits. BAILEY METERS & CONTROLS Ltd. March 3, 1960 [March 3, 1959], No. 7329/59. Class 40(6) In an amplifier with direct-current negative feedback means are provided to reduce the feedback of mains ripple voltages generated in the amplifier. The feedback path comprises R9, R11, R13, the feedback being taken from resistor R13 which is adjustable. Mains ripple voltages are passed by condenser Cl to a transistor phase-reverser T1 which injects a balancing ripple voltage of opposite phase into the feedback network via adjustable resistor R15 and blocking condenser C2. The transistor is provided with base bias via resistor R7; alternatively a potentiometer network connected across the collector voltage supply may be used (Fig. 2, not shown). In a further modification, Fig. 3, which removes from the feedback network the effect of leakage current through the condenser C2, which is of the electrolytic type, a further electrolytic condenser, C13, of the reversible type is placed in series with condenser C2. The join is connected via a resistor to a potentiometer R33, R35 across the output terminals of the amplifier, so that there is no D.C. voltage across the condenser C13. A condenser C37 decouples the network for ripple voltages. The Provisional Specification also describes the use of a transformer instead of a transistor as the phase-reversal means.
GB732959A 1959-03-03 1959-03-03 Improvements in or relating to means for the attenuation of ripple voltages in direct-current circuits Expired GB868018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB732959A GB868018A (en) 1959-03-03 1959-03-03 Improvements in or relating to means for the attenuation of ripple voltages in direct-current circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB732959A GB868018A (en) 1959-03-03 1959-03-03 Improvements in or relating to means for the attenuation of ripple voltages in direct-current circuits

Publications (1)

Publication Number Publication Date
GB868018A true GB868018A (en) 1961-05-17

Family

ID=9831027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB732959A Expired GB868018A (en) 1959-03-03 1959-03-03 Improvements in or relating to means for the attenuation of ripple voltages in direct-current circuits

Country Status (1)

Country Link
GB (1) GB868018A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321667A (en) * 1962-06-04 1967-05-23 Sperry Rand Corp Control systems for electric welders
US4588858A (en) * 1981-08-19 1986-05-13 Texas Instruments Incorporated Differential amplifiers and method of differentially driving a two-wire line circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321667A (en) * 1962-06-04 1967-05-23 Sperry Rand Corp Control systems for electric welders
US4588858A (en) * 1981-08-19 1986-05-13 Texas Instruments Incorporated Differential amplifiers and method of differentially driving a two-wire line circuit

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