JPS54151316A - Radio receiver of pll frequency synthesizer system - Google Patents

Radio receiver of pll frequency synthesizer system

Info

Publication number
JPS54151316A
JPS54151316A JP6036078A JP6036078A JPS54151316A JP S54151316 A JPS54151316 A JP S54151316A JP 6036078 A JP6036078 A JP 6036078A JP 6036078 A JP6036078 A JP 6036078A JP S54151316 A JPS54151316 A JP S54151316A
Authority
JP
Japan
Prior art keywords
frequency
circuit
pll
radio receiver
search
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
JP6036078A
Other languages
Japanese (ja)
Inventor
Mitsuzo Shimomura
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP6036078A priority Critical patent/JPS54151316A/en
Publication of JPS54151316A publication Critical patent/JPS54151316A/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 shorten the search time of the automatic channel selection in the PLL frequency synthesizer system radio receiver, by suitably combining the search modes of plurality different in the frequency step. CONSTITUTION:The reception signal from the antenna input A is in high frequency amplification at the high frequency amplification and frequency conversion circuit 1, converted into intermediate frequency according to the frequency from the PLL circuit 4, amplified at the intermediate amplifying circuit 2, and outputted from the speaker output B via the detection circuit 3. When the search instruction signal of up and down is inputted from the terminal U or D, FF15 is set and the control section 17 selects the mode. The reception frequency is determined with the coded output of the data memory 6 controlling the PLL circuit 4, and if colrrect tuning is not made in a given time, the mode is changed and control is made so that the tuning is obtained by changing the scanning control frequency step of the PLL circuit 4.
JP6036078A 1978-05-19 1978-05-19 Radio receiver of pll frequency synthesizer system Pending JPS54151316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6036078A JPS54151316A (en) 1978-05-19 1978-05-19 Radio receiver of pll frequency synthesizer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6036078A JPS54151316A (en) 1978-05-19 1978-05-19 Radio receiver of pll frequency synthesizer system

Publications (1)

Publication Number Publication Date
JPS54151316A true JPS54151316A (en) 1979-11-28

Family

ID=13139891

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6036078A Pending JPS54151316A (en) 1978-05-19 1978-05-19 Radio receiver of pll frequency synthesizer system

Country Status (1)

Country Link
JP (1) JPS54151316A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60235517A (en) * 1984-05-08 1985-11-22 Casio Comput Co Ltd Tuning device
JPS61158209A (en) * 1984-12-29 1986-07-17 Sony Corp Automatic tuning method of electronic tuner
JPS63311813A (en) * 1987-06-15 1988-12-20 Sony Corp Synthesizer receiver
JPH03106110A (en) * 1989-09-20 1991-05-02 Mitsubishi Electric Corp Electronically tuned radio receiver
JPH0444412A (en) * 1990-06-11 1992-02-14 Noritz Corp Automatic channel selection device for television receiver

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60235517A (en) * 1984-05-08 1985-11-22 Casio Comput Co Ltd Tuning device
JPS61158209A (en) * 1984-12-29 1986-07-17 Sony Corp Automatic tuning method of electronic tuner
JPH0783288B2 (en) * 1984-12-29 1995-09-06 ソニー株式会社 Electronic tuning tuner automatic tuning method
JPS63311813A (en) * 1987-06-15 1988-12-20 Sony Corp Synthesizer receiver
JPH03106110A (en) * 1989-09-20 1991-05-02 Mitsubishi Electric Corp Electronically tuned radio receiver
JPH0444412A (en) * 1990-06-11 1992-02-14 Noritz Corp Automatic channel selection device for television receiver

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