GB816661A - Improvements in or relating to frequency changing circuit arrangements - Google Patents
Improvements in or relating to frequency changing circuit arrangementsInfo
- 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
Links
- 230000000087 stabilizing effect Effects 0.000 abstract 1
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).
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)
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 |
-
1956
- 1956-05-31 GB GB1685856A patent/GB816661A/en not_active Expired
Cited By (2)
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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