GB971739A - Improvements in and relating to amplifiers - Google Patents

Improvements in and relating to amplifiers

Info

Publication number
GB971739A
GB971739A GB3459262A GB3459262A GB971739A GB 971739 A GB971739 A GB 971739A GB 3459262 A GB3459262 A GB 3459262A GB 3459262 A GB3459262 A GB 3459262A GB 971739 A GB971739 A GB 971739A
Authority
GB
United Kingdom
Prior art keywords
network
gain
resistors
sept
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
GB3459262A
Inventor
Roy William Vanlint
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.)
AC Cossor Ltd
Original Assignee
AC Cossor 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 AC Cossor Ltd filed Critical AC Cossor Ltd
Priority to GB3459262A priority Critical patent/GB971739A/en
Publication of GB971739A publication Critical patent/GB971739A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators

Landscapes

  • Amplifiers (AREA)

Abstract

971,739. Amplifiers. A. C. COSSOR Ltd. Sept. 10, 1963 [Sept. 10, 1962], No. 34592/62. Heading H3W. The invention relates to a direct-coupled amplifier in which loss of gain at very low frequencies is compensated by means of a positive feed-back network comprising terminals 13, 14 connected to the amplifier output and 28, 29 connected to the input, and formed of series resistors 18, 19, 21, 22, shunt variable resistor 17 and shunt capacitors 24-27. Such an arrangement gives excessive gain at the lowest frequencies so that if a D.C. input is applied the gain and hence output increase after a time interval; in accordance with the invention this is prevented by shunting the resistor 17 by a network comprising thermistors 10, 11 which are biased from a D.C. source (not shown) via resistors 32, 33 and adjustable resistors 12, 31. Alternatively, the positive feed-back path could be shunted with a second, negative feedback path including a phase reverser and a suitable R.C. network.
GB3459262A 1962-09-10 1962-09-10 Improvements in and relating to amplifiers Expired GB971739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3459262A GB971739A (en) 1962-09-10 1962-09-10 Improvements in and relating to amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3459262A GB971739A (en) 1962-09-10 1962-09-10 Improvements in and relating to amplifiers

Publications (1)

Publication Number Publication Date
GB971739A true GB971739A (en) 1964-10-07

Family

ID=10367556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3459262A Expired GB971739A (en) 1962-09-10 1962-09-10 Improvements in and relating to amplifiers

Country Status (1)

Country Link
GB (1) GB971739A (en)

Similar Documents

Publication Publication Date Title
GB1178348A (en) Negative Feedback Circuit Employing Combination Amplifier and Lead-Lag Compensation Network.
ES363454A1 (en) Electronic process controller having a two part error amplifier
SE7601276L (en) CONTROL DEVICE
GB971813A (en) Improvements in direct-current amplifiers
GB1166680A (en) Improvements in Negative Feed Back Amplifiers
GB1368757A (en) Electronic amplifiers
GB971739A (en) Improvements in and relating to amplifiers
US3872395A (en) Signal conditioning circuit apparatus
GB917721A (en) Transistor amplifier circuit
GB1297058A (en)
GB1225644A (en)
GB1143357A (en) Improvements relating to variable gain networks
GB1033704A (en) Improvements in or relating to transistor amplifiers
GB1179437A (en) Amplifier
GB936629A (en) Improvements in and relating to amplifiers employing transistors
GB971308A (en) Improvements in or relating to a differential amplifier
GB951720A (en) High input impedance transistor amplifier
GB748204A (en) Improvements in transistor integrating circuits
GB757669A (en) Amplifier with mismatched interstage networks
GB873564A (en) Circuit with transistors for wide-band amplification
FR2331912A1 (en) Active bandpass filter of second order - with independently controlled parameters for modulated telephone signals
GB968712A (en) Improvements in or relating to amplifier circuits
GB955927A (en) Improvements in or relating to amplifiers
GB1323918A (en) Bandstop filter
GB1084349A (en)