JPS55107325A - Automatic frequency control circuit for receiver - Google Patents

Automatic frequency control circuit for receiver

Info

Publication number
JPS55107325A
JPS55107325A JP1462779A JP1462779A JPS55107325A JP S55107325 A JPS55107325 A JP S55107325A JP 1462779 A JP1462779 A JP 1462779A JP 1462779 A JP1462779 A JP 1462779A JP S55107325 A JPS55107325 A JP S55107325A
Authority
JP
Japan
Prior art keywords
circuit
signal
level
frequency control
automatic frequency
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.)
Granted
Application number
JP1462779A
Other languages
Japanese (ja)
Other versions
JPS6113411B2 (en
Inventor
Masaru Sugita
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP1462779A priority Critical patent/JPS55107325A/en
Publication of JPS55107325A publication Critical patent/JPS55107325A/en
Publication of JPS6113411B2 publication Critical patent/JPS6113411B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE: To make effective the automatic frequency control, by operating the automatic frequency control circuit only at the muting release period and limiting the level when the level of control signal of the circuit is more than a given value.
CONSTITUTION: In the FM radio receiver, muting signal is obtained at the terminal 6M of the integrated circuit 6. With the absence of reception signal, the signal of level 1 is obtained at the terminal 6M, and the transistor Tr17 is turned on to avoid feeding the output of the Miller integration circuit 11 to the variable capapacitor 13 to make inoperative the automatic frequency control AFC. When the reception frequency approaches the center frequency of the intermediate frequency, the signal at the terminal 6M is level 0 to turn off Tr17 and AFC is operative. When the muting is released and the output of the circuit 11 is more than a given range, the limiter circuit 19 is operated, the output signal of the circuit 11 is fed to the variable capacitor 13 as it is to perform servo-locking. But, if the next station is received, the servo-locking is released to make ease of tuning and effective AFC.
COPYRIGHT: (C)1980,JPO&Japio
JP1462779A 1979-02-09 1979-02-09 Automatic frequency control circuit for receiver Granted JPS55107325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1462779A JPS55107325A (en) 1979-02-09 1979-02-09 Automatic frequency control circuit for receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1462779A JPS55107325A (en) 1979-02-09 1979-02-09 Automatic frequency control circuit for receiver

Publications (2)

Publication Number Publication Date
JPS55107325A true JPS55107325A (en) 1980-08-18
JPS6113411B2 JPS6113411B2 (en) 1986-04-14

Family

ID=11866428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1462779A Granted JPS55107325A (en) 1979-02-09 1979-02-09 Automatic frequency control circuit for receiver

Country Status (1)

Country Link
JP (1) JPS55107325A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5894224A (en) * 1981-11-30 1983-06-04 Nec Home Electronics Ltd Frequency stabilizing circuit and simple tuning displaying circuit of am receiver
JPS5988957U (en) * 1982-12-07 1984-06-16 三洋電機株式会社 FM receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5894224A (en) * 1981-11-30 1983-06-04 Nec Home Electronics Ltd Frequency stabilizing circuit and simple tuning displaying circuit of am receiver
JPS5988957U (en) * 1982-12-07 1984-06-16 三洋電機株式会社 FM receiver

Also Published As

Publication number Publication date
JPS6113411B2 (en) 1986-04-14

Similar Documents

Publication Publication Date Title
JPS5596722A (en) Receiving detection circuit
JPS55107325A (en) Automatic frequency control circuit for receiver
JPS54103601A (en) Uhf electronic tuner
JPS52102626A (en) Tv receiver
JPS57170617A (en) Receiver
JPS5683122A (en) Car radio receiver
JPS5318912A (en) Signal reception circuit of television receiver
JPS5870622A (en) Receiver
JPS5526749A (en) Fm-am broadcast receiver
JPS5320366A (en) Radio wave correction type electronic watch
JPS5516523A (en) Preset channel selector
JPS54128610A (en) High frequency amplifying circuit
JPS5451401A (en) Automatic preset unit
JPS5555618A (en) Radio receiver
JPS5582543A (en) Fm receiver
JPS5658317A (en) Radio receiver
JPS53102614A (en) Ssb receiver
JPS54157417A (en) Channel selecting device containig automatic station searching function
JPS5752219A (en) Electronic tuner
JPS5619219A (en) Stop signal generating circuit for automatic tuning receiver
JPS57201378A (en) Video synchronization detecting device and phase correcting device
JPS5366311A (en) Receiver
JPS5590112A (en) Television agc circuit
JPS5742222A (en) Tuner
JPS5473501A (en) Am/fm stereo radio receiver