GB1070656A – Improvements in or relating to frequency dividers
– Google Patents
GB1070656A – Improvements in or relating to frequency dividers
– Google Patents
Improvements in or relating to frequency dividers
Info
Publication number
GB1070656A
GB1070656A
GB39766/64A
GB3976664A
GB1070656A
GB 1070656 A
GB1070656 A
GB 1070656A
GB 39766/64 A
GB39766/64 A
GB 39766/64A
GB 3976664 A
GB3976664 A
GB 3976664A
GB 1070656 A
GB1070656 A
GB 1070656A
Authority
GB
United Kingdom
Prior art keywords
frequency
filter
oscillator
circuit
inductor
Prior art date
1963-09-30
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
GB39766/64A
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.)
Siemens AG
Original Assignee
Siemens AG
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.)
1963-09-30
Filing date
1964-09-30
Publication date
1967-06-01
1964-09-30
Application filed by Siemens AG
filed
Critical
Siemens AG
1967-06-01
Publication of GB1070656A
publication
Critical
patent/GB1070656A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
H03L7/20—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a harmonic phase-locked loop, i.e. a loop which can be locked to one of a number of harmonically related frequencies applied to it
Abstract
1,070,656. Automatic frequency control systems. SIEMENS A.G. Sept. 30, 1964 [Sept. 30, 1963], No. 39766/64. Heading H3A. An oscillator O applies its oscillations over a fixed ratio frequency multiplier (not shown) to a phase detector Ph which compares the multiplied frequency with a reference frequency, the output of the phase detector Ph being fed over an LC low pass filter to a locking-in generator circuit F used for frequency sweeping the divider oscillator O until the desired subharmonic of the reference frequency is produced, the LC filter also feeding through an RC filter a frequency stabilizing circuit of the oscillator. The LC filter has a low cut-off frequency to suppress undesired harmonics of the oscillator, and its inductor L is shunted by one or a pair of oppositely poled rectifiers D to short circuit the inductor for high amplitude difference frequencies produced for any sudden change of oscillator frequency, liable to produce false frequency synchronizing. The RC filter resembles the inductive branches of a Wien bridge circuit and compensates phase shift due to the LC filter. The A.F.C. voltage is applied from the RC filter to the junction A of a pair of capacitive diodes D1, D2 connected in the oscillator circuit across a centre-tapped inductor, the diodes reverse bias and the frequency sweep output F being applied to the centre tap B. The frequency multiplier (e.g. by 10) may comprise a push-pull rectifier frequency doubler feeding through a double tuned band pass filter a transistor amplifier with collector circuit tuned to the fifth harmonic.
GB39766/64A
1963-09-30
1964-09-30
Improvements in or relating to frequency dividers
Expired
GB1070656A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DES87652A
DE1276127B
(en)
1963-09-30
1963-09-30
Circuit for frequency division
Publications (1)
Publication Number
Publication Date
GB1070656A
true
GB1070656A
(en)
1967-06-01
Family
ID=7513935
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB39766/64A
Expired
GB1070656A
(en)
1963-09-30
1964-09-30
Improvements in or relating to frequency dividers
Country Status (6)
Country
Link
US
(1)
US3309619A
(en)
DE
(1)
DE1276127B
(en)
GB
(1)
GB1070656A
(en)
NL
(1)
NL6410450A
(en)
NO
(1)
NO122078B
(en)
SE
(1)
SE306564B
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3363194A
(en)
*
1965-05-24
1968-01-09
Sylvania Electric Prod
Phase lock loop with extended capture range
US5008571A
(en)
*
1989-06-29
1991-04-16
Ail Systems, Inc.
Method and apparatus for dividing high frequency analog signals
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE9744C
(en)
*
HAGENER GUSSSTAHLWERKE in Hagen, Westph
Process for the production of cast steel chains
NL75725C
(en)
*
1950-05-22
US2843740A
(en)
*
1954-12-14
1958-07-15
Philips Corp
High-frequency multi-channel generator
US3050693A
(en)
*
1960-04-28
1962-08-21
Senn Custom Inc
Variable oscillator circuit utilizing reverse biased diodes for operation at a predetermined frequency
1963
1963-09-30
DE
DES87652A
patent/DE1276127B/en
active
Pending
1964
1964-09-08
NL
NL6410450A
patent/NL6410450A/xx
unknown
1964-09-14
NO
NO154757A
patent/NO122078B/no
unknown
1964-09-28
US
US399717A
patent/US3309619A/en
not_active
Expired – Lifetime
1964-09-29
SE
SE11700/64A
patent/SE306564B/xx
unknown
1964-09-30
GB
GB39766/64A
patent/GB1070656A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE1276127B
(en)
1968-08-29
US3309619A
(en)
1967-03-14
NL6410450A
(en)
1965-03-31
SE306564B
(en)
1968-12-02
NO122078B
(en)
1971-05-18
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