JPS5619206A - Voltage control type oscillating circuit - Google Patents

Voltage control type oscillating circuit

Info

Publication number
JPS5619206A
JPS5619206A JP9377579A JP9377579A JPS5619206A JP S5619206 A JPS5619206 A JP S5619206A JP 9377579 A JP9377579 A JP 9377579A JP 9377579 A JP9377579 A JP 9377579A JP S5619206 A JPS5619206 A JP S5619206A
Authority
JP
Japan
Prior art keywords
circuit
trq
phase
resistance
capacitor
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
JP9377579A
Other languages
Japanese (ja)
Inventor
Makoto Furuhata
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 JP9377579A priority Critical patent/JPS5619206A/en
Publication of JPS5619206A publication Critical patent/JPS5619206A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the variance element of the oscillation frequency by providing a buffer amplifier between the tank circuit and the phase-shifting circuit consisting of the serial circuit of the resistance, the capacitor and the resistance.
CONSTITUTION: The output of the vector adder circuit consisting of differential transistors (TR)Q1∼Q4 is obtained via the current Miller circuit comprising the diode or TRQ9 and TRQ10 connected to the diode and then supplied to LC tank circuit 2 consisting of coil L1, capacitor C and resistance R3. Then TRQ10 forms a tuning amplifying circuit using circuit 2 as the load. This tuning output is supplied to phase-shifting circuit 3 via the emitter-follower circuit comprising resistance R8 plus TRQ11 forming a buffer amplifier. Then the signals across capacitor C4 are supplied in the form of the phase-shift output to the bases of differential amplifying TRQ5 and TRQ8 which produce the input signal source of the vector adder circuit. And the phase-shift output of the other side is applied to the base of TRQ5 via the buffer amplifier. As a result, the effect of the element is eliminated at the side of the phase-shifting circuit, thus reducing the variance element of the oscillation frequency.
COPYRIGHT: (C)1981,JPO&Japio
JP9377579A 1979-07-25 1979-07-25 Voltage control type oscillating circuit Pending JPS5619206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9377579A JPS5619206A (en) 1979-07-25 1979-07-25 Voltage control type oscillating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9377579A JPS5619206A (en) 1979-07-25 1979-07-25 Voltage control type oscillating circuit

Publications (1)

Publication Number Publication Date
JPS5619206A true JPS5619206A (en) 1981-02-23

Family

ID=14091788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9377579A Pending JPS5619206A (en) 1979-07-25 1979-07-25 Voltage control type oscillating circuit

Country Status (1)

Country Link
JP (1) JPS5619206A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0383055U (en) * 1989-12-09 1991-08-23
JPH0385864U (en) * 1989-12-25 1991-08-30
JPH04349834A (en) * 1991-07-27 1992-12-04 Takeshi Hayashi Crawl apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0383055U (en) * 1989-12-09 1991-08-23
JPH0385864U (en) * 1989-12-25 1991-08-30
JPH04349834A (en) * 1991-07-27 1992-12-04 Takeshi Hayashi Crawl apparatus

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