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GB1512953A - Matching circuits - Google Patents

Matching circuits

Info

Publication number
GB1512953A
GB1512953A GB3371174A GB3371174A GB1512953A GB 1512953 A GB1512953 A GB 1512953A GB 3371174 A GB3371174 A GB 3371174A GB 3371174 A GB3371174 A GB 3371174A GB 1512953 A GB1512953 A GB 1512953A
Authority
GB
United Kingdom
Prior art keywords
amplifier
load
gain
amplifiers
resistors
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
GB3371174A
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.)
Marconi Instruments Ltd
Original Assignee
Marconi Instruments 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 Marconi Instruments Ltd filed Critical Marconi Instruments Ltd
Priority to GB3371174A priority Critical patent/GB1512953A/en
Priority to DE19742456640 priority patent/DE2456640C3/en
Publication of GB1512953A publication Critical patent/GB1512953A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/28—Impedance matching networks
    • H03H11/30—Automatic matching of source impedance to load impedance

Landscapes

  • Amplifiers (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

1512953 Matching circuits MARCONI INSTRUMENTS Ltd 8 July 1975 [31 July 1974] 33711/74 Headings H3Q and H3W In a signal generator comprising a variable gain amplifier 12, Fig. 3, feeding a load at 18, the voltages at either end of a resistor 20 in series between the amplifier and load are measured and combined in a predetermined proportion to provide a control signal for the amplifier 12 which keeps the amplifier matched to the load and the power dissipated in the load constant. As described the voltages are measured by detector diodes 11, 13, Fig. 4, rectifying positive and negative half cycles respectively. The rectified signals are applied to amplifiers 43 and 44 having a gain set by resistors 51, 52 and a unity gain respectively, the outputs of the amplifiers being summed through resistors 53, 54 to provide a signal which after comparison with a reference level is used to control the gain of amplifier 12. Choke 55 removes any D.C. offset.
GB3371174A 1974-07-31 1974-07-31 Matching circuits Expired GB1512953A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3371174A GB1512953A (en) 1974-07-31 1974-07-31 Matching circuits
DE19742456640 DE2456640C3 (en) 1974-07-31 1974-11-29 Circuit for adapting the internal resistance of a generator to a load resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3371174A GB1512953A (en) 1974-07-31 1974-07-31 Matching circuits

Publications (1)

Publication Number Publication Date
GB1512953A true GB1512953A (en) 1978-06-01

Family

ID=10356476

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3371174A Expired GB1512953A (en) 1974-07-31 1974-07-31 Matching circuits

Country Status (1)

Country Link
GB (1) GB1512953A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492926A (en) * 1980-08-14 1985-01-08 Tokyo Shibaura Denki Kabushiki Kaisha Amplitude modulation detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492926A (en) * 1980-08-14 1985-01-08 Tokyo Shibaura Denki Kabushiki Kaisha Amplitude modulation detector

Also Published As

Publication number Publication date
DE2456640A1 (en) 1976-02-12
DE2456640B2 (en) 1976-08-19

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee