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GB1161206A - Improvements relating to Frequency Synthesisers. - Google Patents

Improvements relating to Frequency Synthesisers.

Info

Publication number
GB1161206A
GB1161206A GB4130765A GB4130765A GB1161206A GB 1161206 A GB1161206 A GB 1161206A GB 4130765 A GB4130765 A GB 4130765A GB 4130765 A GB4130765 A GB 4130765A GB 1161206 A GB1161206 A GB 1161206A
Authority
GB
United Kingdom
Prior art keywords
frequency
phase
divider
oscillator
sept
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
GB4130765A
Inventor
David Harrington
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.)
GE Healthcare UK Ltd
Plessey Co Ltd
Original Assignee
GE Healthcare UK Ltd
Plessey Co 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 GE Healthcare UK Ltd, Plessey Co Ltd filed Critical GE Healthcare UK Ltd
Priority to GB4130765A priority Critical patent/GB1161206A/en
Publication of GB1161206A publication Critical patent/GB1161206A/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
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H03L7/185—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using a mixer in the loop

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

1,161,206. Automatic frequency control systems. PLESSEY CO. Ltd. 26 Sept., 1966 [29 Sept., 1965], No. 41307/65. Heading H3A. The output F o of a controlled oscillator 1 is fed through a phase splitter 3 to a double bank binary divider 4 which provides two outputs at half the frequency and in phase quadrature to balanced modulators 5 and 6 which are also supplied with a modulating frequency Fm directly and through phase shifter 8; the outputs of the two modulators are combined to give either the sum or the difference frequency according to the phase shift arrangements, and fed through a filter to a variable frequency divider 10 and a phase comparator 11 supplied from a reference oscillator 12 and controlling the oscillator 1. It is shown that F 0 = 2(NFc ΠFm), where N is the ratio of the divider 10 and Fc is the comparison frequency at the comparator 11. The system may be used in a frequency synthesizer and may be applied to a communications receiver which can be tuned to any arbitrary frequency to receive a single sideband transmission.
GB4130765A 1965-09-29 1965-09-29 Improvements relating to Frequency Synthesisers. Expired GB1161206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4130765A GB1161206A (en) 1965-09-29 1965-09-29 Improvements relating to Frequency Synthesisers.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4130765A GB1161206A (en) 1965-09-29 1965-09-29 Improvements relating to Frequency Synthesisers.

Publications (1)

Publication Number Publication Date
GB1161206A true GB1161206A (en) 1969-08-13

Family

ID=10419088

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4130765A Expired GB1161206A (en) 1965-09-29 1965-09-29 Improvements relating to Frequency Synthesisers.

Country Status (1)

Country Link
GB (1) GB1161206A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835413A (en) * 1972-06-16 1974-09-10 Quindar Electronics Crystal phase-locked loop
FR2347820A1 (en) * 1976-04-08 1977-11-04 Rca Corp PHASE LOCKING LOOP INCLUDING A MODULATOR
WO1995016304A1 (en) * 1993-12-07 1995-06-15 National Semiconductor Corporation Phase/frequency modulator
WO1996023366A1 (en) * 1995-01-24 1996-08-01 Nokia Mobile Phones Ltd. A method and circuit for creating a modulated signal in a transceiver
DE10100555B4 (en) * 2001-01-09 2004-05-27 Texas Instruments Deutschland Gmbh Circuit arrangement for generating a phase-locked frequency-modulated carrier frequency signal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835413A (en) * 1972-06-16 1974-09-10 Quindar Electronics Crystal phase-locked loop
FR2347820A1 (en) * 1976-04-08 1977-11-04 Rca Corp PHASE LOCKING LOOP INCLUDING A MODULATOR
WO1995016304A1 (en) * 1993-12-07 1995-06-15 National Semiconductor Corporation Phase/frequency modulator
US5511236A (en) * 1993-12-07 1996-04-23 National Semiconductor Corporation Half duplex RF transceiver
WO1996023366A1 (en) * 1995-01-24 1996-08-01 Nokia Mobile Phones Ltd. A method and circuit for creating a modulated signal in a transceiver
US5991605A (en) * 1995-01-24 1999-11-23 Nokia Mobile Phones Ltd. Method and circuit for creating a modulated signal in a transceiver
DE10100555B4 (en) * 2001-01-09 2004-05-27 Texas Instruments Deutschland Gmbh Circuit arrangement for generating a phase-locked frequency-modulated carrier frequency signal

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees