GB1065907A - Improvements in or relating to tuning arrangements for voltage tunable circuits - Google Patents

Improvements in or relating to tuning arrangements for voltage tunable circuits

Info

Publication number
GB1065907A
GB1065907A GB53667/65A GB5366765A GB1065907A GB 1065907 A GB1065907 A GB 1065907A GB 53667/65 A GB53667/65 A GB 53667/65A GB 5366765 A GB5366765 A GB 5366765A GB 1065907 A GB1065907 A GB 1065907A
Authority
GB
United Kingdom
Prior art keywords
frequency
analogue
voltage tunable
digital
relating
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
GB53667/65A
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.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
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 Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1065907A publication Critical patent/GB1065907A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
    • H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • 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
    • H03L7/181—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 numerical count result being used for locking the loop, the counter counting during fixed time intervals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/10—Calibration or testing
    • H03M1/1009—Calibration

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

1,065,907. Digital-to-analogue converters. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. Dec. 17, 1965 [Dec. 19. 1964], No. 53667/65. Heading G4H. A tuning arrangement for a voltage tunable circuit comprises a digital counter (Fig. 4, not shown) which makes a count representing the frequency of the oscillator (1), and means (6a-6e) for converting each decade value to an analogue form for comparison with a similar signal representing the desired frequency, the comparator outputs (5a, 5o<SP>1</SP>-5e, 5e<SP>1</SP>) causing resistors to be switched into the charging circuits of capacitor 3 to control the frequency of the oscillator. The desired frequency is stored in digital storage units (9a-9e) and converted (8a-8e) to an analogue comparison signal. The arrangement is such that an error output on one of the comparators operates a high or low switch (So, Sa<SP>1</SP> &c.) the effect of which is to change the frequency to remove -the error.
GB53667/65A 1964-12-19 1965-12-17 Improvements in or relating to tuning arrangements for voltage tunable circuits Expired GB1065907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET27668A DE1218554B (en) 1964-12-19 1964-12-19 Method and arrangement for setting and keeping the frequency of an oscillator constant

Publications (1)

Publication Number Publication Date
GB1065907A true GB1065907A (en) 1967-04-19

Family

ID=7553651

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53667/65A Expired GB1065907A (en) 1964-12-19 1965-12-17 Improvements in or relating to tuning arrangements for voltage tunable circuits

Country Status (2)

Country Link
DE (1) DE1218554B (en)
GB (1) GB1065907A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621487A (en) * 1969-06-30 1971-11-16 Rca Corp Sequencer
USB351863I5 (en) * 1972-05-04 1975-01-28

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175671B1 (en) * 1972-03-17 1977-04-01 Trt Telecom Radio Electr

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621487A (en) * 1969-06-30 1971-11-16 Rca Corp Sequencer
USB351863I5 (en) * 1972-05-04 1975-01-28
US3914700A (en) * 1972-05-04 1975-10-21 Loewe Optal Gmbh Switching arrangement for picking up stored constant voltages

Also Published As

Publication number Publication date
DE1218554B (en) 1966-06-08

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