JPS5459816A - Tuning voltage sweep circuit - Google Patents

Tuning voltage sweep circuit

Info

Publication number
JPS5459816A
JPS5459816A JP12573677A JP12573677A JPS5459816A JP S5459816 A JPS5459816 A JP S5459816A JP 12573677 A JP12573677 A JP 12573677A JP 12573677 A JP12573677 A JP 12573677A JP S5459816 A JPS5459816 A JP S5459816A
Authority
JP
Japan
Prior art keywords
sweepage
integration constant
output
speed
sweep
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
JP12573677A
Other languages
Japanese (ja)
Other versions
JPS6036652B2 (en
Inventor
Toshinori Murata
Shigeo Matsuura
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 JP12573677A priority Critical patent/JPS6036652B2/en
Priority to US06/951,043 priority patent/US4270219A/en
Priority to CA313,429A priority patent/CA1127782A/en
Publication of JPS5459816A publication Critical patent/JPS5459816A/en
Publication of JPS6036652B2 publication Critical patent/JPS6036652B2/en
Expired 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
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H03J7/28—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using counters or frequency dividers

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To stop the sweepage at the optimum tuning point by lowering the voltge by the fixed valve at the sweep stop time to eliminate occurrence of the oversweep through the high-speed sweepage with reduction of the integration constant at the channel selection start time and through the low-speed sweepage with increases integration constant near the desirable channel-selected station. CONSTITUTION:Electronic tuner 1 possesses the voltage control type local oscillator, and tuning voltae sweep circuit 8 generates the pulse which increases with the time lapse to apply it to the integrating circit. Thus, the DC voltage is obtained at the output side. While the oscillation output of the local oscillator in tuner 1 detects (3) elastic surface wave filter SAW2 and its output, and then counts (7) the output frequencies of the output to stop the sweepage of circuit 8 after counting. Thus, the channel selection is carried out. In this case, the integration constant of the integrating circuit is switched, the high-speed sweepage is carried out with reduced integration constant at the channel selection start time, the low-speed sweepage is given with increased integration constant near the desirable channel-selected station, and the voltage is lowered by the fixed amount at the sweep stop time. Thus, the occurrence of the oversweep is eliminated, and the sweep of the tuning voltage can be stopped at the optimum tuning point.
JP12573677A 1977-10-14 1977-10-21 Tuned voltage sweep circuit Expired JPS6036652B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP12573677A JPS6036652B2 (en) 1977-10-21 1977-10-21 Tuned voltage sweep circuit
US06/951,043 US4270219A (en) 1977-10-14 1978-10-13 Channel selection apparatus tunable to destined frequency in short time
CA313,429A CA1127782A (en) 1977-10-14 1978-10-13 Channel selection apparatus tunable to destined frequency in short time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12573677A JPS6036652B2 (en) 1977-10-21 1977-10-21 Tuned voltage sweep circuit

Publications (2)

Publication Number Publication Date
JPS5459816A true JPS5459816A (en) 1979-05-14
JPS6036652B2 JPS6036652B2 (en) 1985-08-21

Family

ID=14917508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12573677A Expired JPS6036652B2 (en) 1977-10-14 1977-10-21 Tuned voltage sweep circuit

Country Status (1)

Country Link
JP (1) JPS6036652B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652347U (en) * 1979-09-29 1981-05-08
JPS5710523A (en) * 1980-06-23 1982-01-20 Mitsubishi Electric Corp Automatic sweep digital tuning circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6477070A (en) * 1987-06-03 1989-03-23 Fuji Xerox Co Ltd Recorder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652347U (en) * 1979-09-29 1981-05-08
JPS5710523A (en) * 1980-06-23 1982-01-20 Mitsubishi Electric Corp Automatic sweep digital tuning circuit
JPS6329850B2 (en) * 1980-06-23 1988-06-15 Mitsubishi Electric Corp

Also Published As

Publication number Publication date
JPS6036652B2 (en) 1985-08-21

Similar Documents

Publication Publication Date Title
JPS5459816A (en) Tuning voltage sweep circuit
JPS5580924A (en) Phase comparator
JPS52122451A (en) Oscillation circuit
JPS5467301A (en) Channel selector
JPS572130A (en) Starting circuit for oscillating circuit
JPS56110306A (en) Voltage control type oscillator for pll frequency synthesizer
GB2008879A (en) Relaxation oscillator
JPS54141513A (en) Multiplex radio reday unit
JPS5625874A (en) Horizontal afc unit
DE60033069T2 (en) A method and apparatus for tracking the length of a sleep period in a mobile station
JPS5586209A (en) Automatic high-frequency level regulator circuit
JPS5511684A (en) Crystal oscillation circuit
JPS5434669A (en) Frequency discriminator
JPS5787371A (en) Ink jet head
JPS56103523A (en) Active filter circuit
JPS5564424A (en) Channel-number counter
JPS5453901A (en) Channel selector
JPS5422147A (en) Oscillator circuit
JPS5370739A (en) Blocking filter for strip line band
JPS5713977A (en) Controlling for pwm inverter
JPS55140306A (en) Fm am direct converter
JPS53111231A (en) Generating circuit for tuning voltage
JPS5797234A (en) Output setting circuit for charge pump
JPS55153421A (en) Counter for channel number
JPS5375791A (en) Crystal oscillator

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees