JPS56104525A - Pll frequency synthesizer tuner - Google Patents

Pll frequency synthesizer tuner

Info

Publication number
JPS56104525A
JPS56104525A JP687280A JP687280A JPS56104525A JP S56104525 A JPS56104525 A JP S56104525A JP 687280 A JP687280 A JP 687280A JP 687280 A JP687280 A JP 687280A JP S56104525 A JPS56104525 A JP S56104525A
Authority
JP
Japan
Prior art keywords
circuit
signal
frequency
detection circuit
voltage
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
JP687280A
Other languages
Japanese (ja)
Inventor
Masami Kawamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP687280A priority Critical patent/JPS56104525A/en
Publication of JPS56104525A publication Critical patent/JPS56104525A/en
Pending 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
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0041—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers
    • H03J1/005—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers in a loop

Abstract

PURPOSE:To reduce the number of both externaly attached terminals and externally attached parts for a monolithic IC, by smoothing the output signal of a phase detection circuit to use it for the mute control signal and the auto-scan control signal of a control circuit. CONSTITUTION:The monolitic IC1 of 1-chip structure forming the primary part of a PLL frequency synthesizer tuner divides the oscillation frequency of the VCO9 by means of the prescaler 2 and program counter 3 to supply said frequency to the pahse detection circuit 4, detects the phase difference between said frequency and the reference oscillation frequency signal fr to convert it into the DC voltage through the loop filter 8, and controls the VCO9 as well as the tuning circuit of the high- frequency amplifying circuit 10. The pulse duration signal produced by the circuit 4 and corresponding to the phase difference of the input signals is converted into the voltage signal through the smoothing circuit to be used for the mute control signal to be supplied to the wave detection circuit 12 as well as the FM intermediate frequency. At the same time, the voltage signal is used as the unlock signal to be supplied to the control circuit 6 within an IC.
JP687280A 1980-01-25 1980-01-25 Pll frequency synthesizer tuner Pending JPS56104525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP687280A JPS56104525A (en) 1980-01-25 1980-01-25 Pll frequency synthesizer tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP687280A JPS56104525A (en) 1980-01-25 1980-01-25 Pll frequency synthesizer tuner

Publications (1)

Publication Number Publication Date
JPS56104525A true JPS56104525A (en) 1981-08-20

Family

ID=11650314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP687280A Pending JPS56104525A (en) 1980-01-25 1980-01-25 Pll frequency synthesizer tuner

Country Status (1)

Country Link
JP (1) JPS56104525A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58107715A (en) * 1981-12-22 1983-06-27 Sony Corp Channel selecting device
JPS62139420A (en) * 1985-12-13 1987-06-23 Hitachi Ltd Synthesizer receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58107715A (en) * 1981-12-22 1983-06-27 Sony Corp Channel selecting device
JPH0251288B2 (en) * 1981-12-22 1990-11-07 Sony Corp
JPS62139420A (en) * 1985-12-13 1987-06-23 Hitachi Ltd Synthesizer receiver

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