GB2073981B - Frequency comparison arrangement for a digital tuning system - Google Patents

Frequency comparison arrangement for a digital tuning system

Info

Publication number
GB2073981B
GB2073981B GB8110505A GB8110505A GB2073981B GB 2073981 B GB2073981 B GB 2073981B GB 8110505 A GB8110505 A GB 8110505A GB 8110505 A GB8110505 A GB 8110505A GB 2073981 B GB2073981 B GB 2073981B
Authority
GB
United Kingdom
Prior art keywords
tuning system
frequency comparison
digital tuning
comparison arrangement
arrangement
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
GB8110505A
Other versions
GB2073981A (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
Application filed by RCA Corp filed Critical RCA Corp
Priority to GB8110505A priority Critical patent/GB2073981B/en
Publication of GB2073981A publication Critical patent/GB2073981A/en
Application granted granted Critical
Publication of GB2073981B publication Critical patent/GB2073981B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03J5/0254—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 transfered to a D/A converter
    • H03J5/0263—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 transfered to a D/A converter the digital values being held in an auxiliary non erasable memory
    • 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
GB8110505A 1980-04-08 1981-04-03 Frequency comparison arrangement for a digital tuning system Expired GB2073981B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8110505A GB2073981B (en) 1980-04-08 1981-04-03 Frequency comparison arrangement for a digital tuning system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8011554 1980-04-08
GB8110505A GB2073981B (en) 1980-04-08 1981-04-03 Frequency comparison arrangement for a digital tuning system

Publications (2)

Publication Number Publication Date
GB2073981A GB2073981A (en) 1981-10-21
GB2073981B true GB2073981B (en) 1983-09-28

Family

ID=26275097

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8110505A Expired GB2073981B (en) 1980-04-08 1981-04-03 Frequency comparison arrangement for a digital tuning system

Country Status (1)

Country Link
GB (1) GB2073981B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8104415A (en) * 1981-09-25 1983-04-18 Philips Nv TUNING SHIFT WITH A FREQUENCY SYNTHESIS SHIFT.
US4450587A (en) * 1981-11-27 1984-05-22 Rca Corporation Tuning arrangement for providing relatively uniform automatic fine tuning sensitivity
GB2144005B (en) * 1983-07-28 1986-10-22 Rca Corp Digital-to-analog converter useful in a television receiver
US4550292A (en) * 1983-09-06 1985-10-29 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Automatic oscillator frequency control system
GB2229332A (en) * 1989-03-15 1990-09-19 Multitone Electronics Plc Frequency synthesisers

Also Published As

Publication number Publication date
GB2073981A (en) 1981-10-21

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960403