JPS5590105A - High-frequency oscillation circuit - Google Patents

High-frequency oscillation circuit

Info

Publication number
JPS5590105A
JPS5590105A JP16248878A JP16248878A JPS5590105A JP S5590105 A JPS5590105 A JP S5590105A JP 16248878 A JP16248878 A JP 16248878A JP 16248878 A JP16248878 A JP 16248878A JP S5590105 A JPS5590105 A JP S5590105A
Authority
JP
Japan
Prior art keywords
diode
frequency
oscillation circuit
oscillation
varactor
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
JP16248878A
Other languages
Japanese (ja)
Inventor
Seiichi Tanaka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16248878A priority Critical patent/JPS5590105A/en
Publication of JPS5590105A publication Critical patent/JPS5590105A/en
Pending legal-status Critical Current

Links

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE: To prevent abnormal oscillation, by connecting a diode in the same direction as a varactor diode in a high-frequency LC oscillation circuit using the varactor diode.
CONSTITUTION: The oscillation frequency of a Colpitts high-frequency oscillation circuit is determined by coil L1 and resonance capacity C3 and the DC voltage of varactor diode D1. To vary the frequency, variable resistance VR1 is varied to vary a voltage applied across diode D1. In the same direction as diode D1, diode D2 of small forward resistance with no capacitive property is connected matching in polarity with diode D1. Consequently, varactor diode D1 is shorted by diode D2 when diode D1 is applied with a forward bias, so that abnormal oscillation can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP16248878A 1978-12-28 1978-12-28 High-frequency oscillation circuit Pending JPS5590105A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16248878A JPS5590105A (en) 1978-12-28 1978-12-28 High-frequency oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16248878A JPS5590105A (en) 1978-12-28 1978-12-28 High-frequency oscillation circuit

Publications (1)

Publication Number Publication Date
JPS5590105A true JPS5590105A (en) 1980-07-08

Family

ID=15755559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16248878A Pending JPS5590105A (en) 1978-12-28 1978-12-28 High-frequency oscillation circuit

Country Status (1)

Country Link
JP (1) JPS5590105A (en)

Similar Documents

Publication Publication Date Title
JPS5726902A (en) Fet oscillation circuit
JPS6482807A (en) Microwave oscillator
JPS5590105A (en) High-frequency oscillation circuit
JPS56120203A (en) Controllable oscillator in frequency by current change
JPS5528677A (en) Frequency conversion circuit
JPS5673906A (en) Microwave oscillator
JPS5731206A (en) Voltage control oscillator
JPS5555604A (en) Piezoelectric oscillator of temperature compensation type
EP0165736A3 (en) Injection locked rf oscillator and method of generating rf energy
JPS55125703A (en) Voltage controlled crystal oscillator
JPS5773518A (en) Voltage-controlling oscillator circuit
JPS567526A (en) Diode switch circuit including resonant circuit
JPS55125702A (en) Crystal oscillator of temperature compensation
JPS54144812A (en) Audio demodulator
JPS55147808A (en) Overtone oscillator
JPS55149509A (en) Uhf high frequency amplifying circuit
JPS5539453A (en) Self-oscillating circuit
JPS57192104A (en) Voltage controlled quartz oscillator
JPS6486701A (en) Voltage controlled crystal oscillating device
JPS57101402A (en) Voltage controlled variable frequency oscillator
JPS5783903A (en) Quartz oscillating circuit
JPS5752204A (en) Microwave integrated circuit type oscillator
JPS55112006A (en) Oscillator
JPS54144165A (en) Crystal oscillator circuit
JPS5467364A (en) Driving circuit