JPS55121742A - Pll frequency synthesizer tuner - Google Patents

Pll frequency synthesizer tuner

Info

Publication number
JPS55121742A
JPS55121742A JP2962179A JP2962179A JPS55121742A JP S55121742 A JPS55121742 A JP S55121742A JP 2962179 A JP2962179 A JP 2962179A JP 2962179 A JP2962179 A JP 2962179A JP S55121742 A JPS55121742 A JP S55121742A
Authority
JP
Japan
Prior art keywords
frequency
signal
output
amplifier
circuit
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
JP2962179A
Other languages
Japanese (ja)
Inventor
Tadashi Kosuge
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP2962179A priority Critical patent/JPS55121742A/en
Publication of JPS55121742A publication Critical patent/JPS55121742A/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

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To ensure the correction for the shift of the central frequency of the band pass filter in the intermediate-frequency amplifier by giving the control to the VCO generating the 2nd local oscillation signal via the detection output of the 2nd intermediate-frequency signal, thus preventing the S/N deterioration. CONSTITUTION:The high-frequency reception signal is converted into the 1st intermediate-frequency signal fi1 by the 1st local oscillation signal fl1 given from PLL circuit 6 to be then selected and amplified at the 1st intermediate-frequency amplifier 4a. Signal fi1 is then mixed with the 2nd local oscillation frequency fl2 which is the output of voltage control type oscillator (VCO)9 and then converted into the 2nd intermediate-frequency signal to receive the selection/amplification through the 2nd intermediate-frequency amplifier 4b using the ceramic filter. And the output of amplifier 4b is supplied to frequency discriminating circuit 5. The output of circuit 5 is smoothed by AFC control signal generating circuit 8 and then applied to VCO9 via switch 10 to give the control to the oscillation frequency.
JP2962179A 1979-03-14 1979-03-14 Pll frequency synthesizer tuner Pending JPS55121742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2962179A JPS55121742A (en) 1979-03-14 1979-03-14 Pll frequency synthesizer tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2962179A JPS55121742A (en) 1979-03-14 1979-03-14 Pll frequency synthesizer tuner

Publications (1)

Publication Number Publication Date
JPS55121742A true JPS55121742A (en) 1980-09-19

Family

ID=12281149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2962179A Pending JPS55121742A (en) 1979-03-14 1979-03-14 Pll frequency synthesizer tuner

Country Status (1)

Country Link
JP (1) JPS55121742A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60245319A (en) * 1984-05-19 1985-12-05 Rohm Co Ltd Fm receiving device of synthesizer system
JPS6333226U (en) * 1986-08-20 1988-03-03
JPS6387921U (en) * 1986-11-28 1988-06-08
KR19990022505A (en) * 1995-06-06 1999-03-25 크리트먼 어윈 엠 Tuner device for digital satellite receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60245319A (en) * 1984-05-19 1985-12-05 Rohm Co Ltd Fm receiving device of synthesizer system
JPS6333226U (en) * 1986-08-20 1988-03-03
JPS6387921U (en) * 1986-11-28 1988-06-08
KR19990022505A (en) * 1995-06-06 1999-03-25 크리트먼 어윈 엠 Tuner device for digital satellite receiver

Similar Documents

Publication Publication Date Title
JPS5657324A (en) Digital electronic tuning system
JPS55121742A (en) Pll frequency synthesizer tuner
US4495650A (en) Electronic tuning type radio receivers
JPS55110424A (en) Synthesizer receiver
GB1309339A (en) Television receiver
JPS5625810A (en) Receiver
JPS56103514A (en) Filter circuit
JPS561630A (en) Broadcast receiver
JPS5646324A (en) Fm tuner circuit
ES8502822A1 (en) Tuning circuit for at least two frequency ranges.
JPS6233400Y2 (en)
JPS6028330A (en) Double superheterodyne tuner
JPS55147823A (en) Electronic tuning circuit
JPS5642439A (en) Broad band tuner
JPS5661838A (en) Automatic tuning system for synthesizer tuner
JPS5488712A (en) Vhf television tuner
JPS55121710A (en) Short-medium wave conversion system
JPS55127772A (en) Two-frequency signal discriminating circuit
JPS56104549A (en) Correction method for variation of intermediate frequency selecting element
JPS5537049A (en) Automatic selecting trigger circuit
JPS5484401A (en) Fm-am receiver with frequency counter
JPS55127724A (en) Superheterodyne receiver
JPS54122914A (en) Radio receiver of pll frequency synthesizer system
JPS57123718A (en) Electronic channel selector
JPS5642438A (en) Broad band tuner