GB816661A - Improvements in or relating to frequency changing circuit arrangements - Google Patents

Improvements in or relating to frequency changing circuit arrangements

Info

Publication number
GB816661A
GB816661A GB1685856A GB1685856A GB816661A GB 816661 A GB816661 A GB 816661A GB 1685856 A GB1685856 A GB 1685856A GB 1685856 A GB1685856 A GB 1685856A GB 816661 A GB816661 A GB 816661A
Authority
GB
United Kingdom
Prior art keywords
frequency
relating
circuit arrangements
changing circuit
frequency changing
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
GB1685856A
Inventor
Wilfred Sinden Mortley
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
Filing date
Publication date
Application filed by Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to US657384A priority Critical patent/US2882394A/en
Priority to ES0235615A priority patent/ES235615A1/en
Publication of GB816661A publication Critical patent/GB816661A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop

Landscapes

  • Transmitters (AREA)

Abstract

816,661. Automatic frequency control systems. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. March 7, 1957 [May 31, 1956], No. 16858/56. Class 38 (4). A frequency changer for changing an input frequency F1 by a small amount to an output frequency F4 comprises oscillators F2, F3 for successively reducing the input frequency F1 to (F1 - F2) and increasing it to (F1 +F3 - F2)= F4 and stabilizing means for the small frequency difference (F2 - F3) comprising a frequency mixer 8 and discriminator 10 with cross-over frequency (F2 - F3), D.C. amplifier 11 and variable reactance 4, controlling the frequency of oscillator F2 (or both oscillators F2, F3 in opposite senses) to make (F2 - F3) constant. An adjustable D.C. potential may also be superimposed on the control voltage to vary the stabilized value (F2-F3).
GB1685856A 1956-05-31 1956-05-31 Improvements in or relating to frequency changing circuit arrangements Expired GB816661A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US657384A US2882394A (en) 1956-05-31 1957-05-06 Frequency changing circuit arrangements
ES0235615A ES235615A1 (en) 1956-05-31 1957-05-22 Frequency changing circuit arrangements

Publications (1)

Publication Number Publication Date
GB816661A true GB816661A (en) 1959-07-15

Family

ID=1732627

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1685856A Expired GB816661A (en) 1956-05-31 1956-05-31 Improvements in or relating to frequency changing circuit arrangements

Country Status (1)

Country Link
GB (1) GB816661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032358A (en) * 1960-03-04 1962-05-01 Kenneth P Rolston Hose coupling
GB2160724A (en) * 1978-01-26 1985-12-24 Int Standard Electric Corp Frequency translator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032358A (en) * 1960-03-04 1962-05-01 Kenneth P Rolston Hose coupling
GB2160724A (en) * 1978-01-26 1985-12-24 Int Standard Electric Corp Frequency translator

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