JPS57127326A - Fine tuning superposition pulse forming circuit in electronic channel selector - Google Patents

Fine tuning superposition pulse forming circuit in electronic channel selector

Info

Publication number
JPS57127326A
JPS57127326A JP1152681A JP1152681A JPS57127326A JP S57127326 A JPS57127326 A JP S57127326A JP 1152681 A JP1152681 A JP 1152681A JP 1152681 A JP1152681 A JP 1152681A JP S57127326 A JPS57127326 A JP S57127326A
Authority
JP
Japan
Prior art keywords
dividing ratio
circuit
fine adjustment
channel selector
timing pulse
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.)
Pending
Application number
JP1152681A
Other languages
Japanese (ja)
Inventor
Kenji Miura
Masahiro Fujita
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1152681A priority Critical patent/JPS57127326A/en
Publication of JPS57127326A publication Critical patent/JPS57127326A/en
Pending 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

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To carry out a fine adjustment for the received frequency of a wide band for an electronic channel selector using the frequency synthesizer system, by forming a timing pulse to vary the dividing ratio of a programmable divider every time when the dividing ratio passes the received frequency value. CONSTITUTION:Dividing ratio setting data is set to U/D counters 32-36 to set a channel, and fine adjustment data equivalent to the shift of an IF delivered from an electronic tuner 21 is formed by a fine adjustment signal producing circuit 37. The fine adjustment data is applied to the counters 32-36 to be added to or subtracted from the dividing ratio setting data. The result of this addition or subtraction is supplied to a designated input terminal of a programmable divider 23. Then a pulse forming circuit 44 is provided to form a timing pulse to reduce the dividing ratio of the divider 23 or the dividing ratio setting speed. Then the timing pulse given from the circuit 44 is supplied to the circuit 37 and a channel selection controlling circuit 28.
JP1152681A 1981-01-30 1981-01-30 Fine tuning superposition pulse forming circuit in electronic channel selector Pending JPS57127326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1152681A JPS57127326A (en) 1981-01-30 1981-01-30 Fine tuning superposition pulse forming circuit in electronic channel selector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1152681A JPS57127326A (en) 1981-01-30 1981-01-30 Fine tuning superposition pulse forming circuit in electronic channel selector

Publications (1)

Publication Number Publication Date
JPS57127326A true JPS57127326A (en) 1982-08-07

Family

ID=11780406

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1152681A Pending JPS57127326A (en) 1981-01-30 1981-01-30 Fine tuning superposition pulse forming circuit in electronic channel selector

Country Status (1)

Country Link
JP (1) JPS57127326A (en)

Similar Documents

Publication Publication Date Title
JPS555080A (en) Motor speed controller
GB1520849A (en) Channel selecting apparatus for a television receiver
FR2452737B1 (en)
JPS57127326A (en) Fine tuning superposition pulse forming circuit in electronic channel selector
EP0354986A3 (en) A method and circuitry for automatic control, according to the counter principle, of the frequency of a radio telephone
ES2048681A1 (en) digital frequency synthesizer.
JPS5486377A (en) Electronic watch
JPS55123241A (en) Synthesizer receiver
JPS5775021A (en) Superposing circuit for fine tuning in electronic tuning tuner
JPS5676624A (en) Electronic tuning tuner device
JPS5523657A (en) Correction circuit for reception frequency
JPS5526731A (en) Television tuner
FR2263635A1 (en) High stability frequency converter - uses three mixing circuits and a quartz controlled pilot oscillator
JPS56122221A (en) Broadcast receiver
JPS5614758A (en) Frequency division system
JPS55100732A (en) Electronic tuner
JPS5784695A (en) Control circuit for transmission frequency
JPS53111203A (en) Automatic correcting circuit for frequency tuning
JPS55128188A (en) Electronic watch
JPS54147765A (en) Frequency division circuit
JPS5542050A (en) Electronic watch containing radio receiving function
JPS5784629A (en) Channel selection circuit
JPS57135555A (en) Phase continuous fsk modulating circuit
JPS57123718A (en) Electronic channel selector
JPS561630A (en) Broadcast receiver