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FR2371822A1 - Electronic tuning unit for radio or TV receivers - uses active devices to adjust local oscillator by phase lock loop - Google Patents

Electronic tuning unit for radio or TV receivers - uses active devices to adjust local oscillator by phase lock loop

Info

Publication number
FR2371822A1
FR2371822A1 FR7732112A FR7732112A FR2371822A1 FR 2371822 A1 FR2371822 A1 FR 2371822A1 FR 7732112 A FR7732112 A FR 7732112A FR 7732112 A FR7732112 A FR 7732112A FR 2371822 A1 FR2371822 A1 FR 2371822A1
Authority
FR
France
Prior art keywords
local oscillator
radio
receivers
phase lock
lock loop
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.)
Granted
Application number
FR7732112A
Other languages
French (fr)
Other versions
FR2371822B1 (en
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.)
RCA Corp
Original Assignee
RCA Corp
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
Priority claimed from GB44661/76A external-priority patent/GB1590444A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2371822A1 publication Critical patent/FR2371822A1/en
Application granted granted Critical
Publication of FR2371822B1 publication Critical patent/FR2371822B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/02—Indicating arrangements
    • H03J1/04—Indicating arrangements with optical indicating means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Television Receiver Circuits (AREA)

Abstract

An electronic unit is used to provide phase-lock-loop tuning in radio and television receivers. It produces local oscillator signals from a reference frequency derived from a cristal oscillator. It has greater reliability and flexibility than the usual passive units. The unit has a series of preset resistors, a mono-stable multivibrator, and a programme selector to select the duration of the programming. There are also a local oscillator, counters, a switch and a phase comparator. The comparator produces an error signal representing the deviations in phase and frequency between the reference frequency signal and an output signal, nad also produces a signal for adjusting the local oscillator.
FR7732112A 1976-10-27 1977-10-25 Electronic tuning unit for radio or TV receivers - uses active devices to adjust local oscillator by phase lock loop Granted FR2371822A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB44661/76A GB1590444A (en) 1976-10-27 1976-10-27 Phase locked loop tuning system with preset tuning
US05/790,863 US4097810A (en) 1976-10-27 1977-04-26 Phase locked loop tuning system with a preset channel memory

Publications (2)

Publication Number Publication Date
FR2371822A1 true FR2371822A1 (en) 1978-06-16
FR2371822B1 FR2371822B1 (en) 1982-01-29

Family

ID=26265434

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7732112A Granted FR2371822A1 (en) 1976-10-27 1977-10-25 Electronic tuning unit for radio or TV receivers - uses active devices to adjust local oscillator by phase lock loop

Country Status (7)

Country Link
JP (1) JPS5354406A (en)
AU (1) AU515265B2 (en)
CA (1) CA1096519A (en)
DE (1) DE2748321A1 (en)
FI (1) FI773122A (en)
FR (1) FR2371822A1 (en)
SE (1) SE422133B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401557A1 (en) * 1977-08-22 1979-03-23 Rca Corp TIME INTERVAL CONTROL DEVICE

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919994C2 (en) * 1979-05-17 1986-12-18 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Digital frequency synthesizer
JPS5890831A (en) * 1982-11-22 1983-05-30 Nec Corp Tuner
PL149642B1 (en) * 1986-04-08 1990-03-31 Digital frequency synthetizer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1961329A1 (en) * 1969-12-06 1971-06-24 Wandel & Goltermann Digitally adjustable frequency-controlled vibration generator
FR2305887A1 (en) * 1975-03-22 1976-10-22 Bosch Gmbh Robert MOUNTING INCLUDING A FREQUENCY REGULATOR

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1961329A1 (en) * 1969-12-06 1971-06-24 Wandel & Goltermann Digitally adjustable frequency-controlled vibration generator
FR2305887A1 (en) * 1975-03-22 1976-10-22 Bosch Gmbh Robert MOUNTING INCLUDING A FREQUENCY REGULATOR

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV202/76 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401557A1 (en) * 1977-08-22 1979-03-23 Rca Corp TIME INTERVAL CONTROL DEVICE

Also Published As

Publication number Publication date
FR2371822B1 (en) 1982-01-29
JPS5718378B2 (en) 1982-04-16
JPS5354406A (en) 1978-05-17
SE422133B (en) 1982-02-15
FI773122A (en) 1978-04-28
SE7711846L (en) 1978-04-28
AU2994677A (en) 1979-04-26
DE2748321A1 (en) 1978-05-03
AU515265B2 (en) 1981-03-26
CA1096519A (en) 1981-02-24

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Legal Events

Date Code Title Description
ST Notification of lapse