JPS5511670A - Semiconductor direct oscillator - Google Patents

Semiconductor direct oscillator

Info

Publication number
JPS5511670A
JPS5511670A JP8482978A JP8482978A JPS5511670A JP S5511670 A JPS5511670 A JP S5511670A JP 8482978 A JP8482978 A JP 8482978A JP 8482978 A JP8482978 A JP 8482978A JP S5511670 A JPS5511670 A JP S5511670A
Authority
JP
Japan
Prior art keywords
frequency
voltage
varactor
comparator
stabilize
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
JP8482978A
Other languages
Japanese (ja)
Inventor
Mikio Suzuki
Kiyohiro Haga
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8482978A priority Critical patent/JPS5511670A/en
Publication of JPS5511670A publication Critical patent/JPS5511670A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element
    • H03L7/04—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element wherein the frequency-determining element comprises distributed inductance and capacitance

Abstract

PURPOSE:To carry out an automatic frequency adjustment for the semiconductor direct oscillator by adjusting and selecting properly the pass band of the filter, and thus to stabilize the oscillation frequency. CONSTITUTION:The frequency is adjusted via machine tuning screw 5, and at the same time semiconductor variable capacity element (varactor) 11 is loaded into the cavity. Thus, an automatic adjustment is given to the frequency via the bias voltage to be applied. In other words, when the frequency becomes higher than desired frequency f0 of the oscillation frequency, the difference voltage of comparator 10 becomes positive by the characteristics of filter 6 and 7 plus detector 8 and 9. If the output voltage is offset to V0 when the difference voltage of comparator 10 is 0, the application voltage to varactor 11 becomes higher than V0 via varactor application voltage control circuit 12. And the originating frequency is lowered to be steady at f0. While if the application voltage is lower than V0, the oscillation frequency becomes high to also stabilize f0.
JP8482978A 1978-07-12 1978-07-12 Semiconductor direct oscillator Pending JPS5511670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8482978A JPS5511670A (en) 1978-07-12 1978-07-12 Semiconductor direct oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8482978A JPS5511670A (en) 1978-07-12 1978-07-12 Semiconductor direct oscillator

Publications (1)

Publication Number Publication Date
JPS5511670A true JPS5511670A (en) 1980-01-26

Family

ID=13841649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8482978A Pending JPS5511670A (en) 1978-07-12 1978-07-12 Semiconductor direct oscillator

Country Status (1)

Country Link
JP (1) JPS5511670A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5302921A (en) * 1991-05-31 1994-04-12 Seiko Epson Corporation Piezoelectric oscillator having reduced radiation of higher harmonics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5302921A (en) * 1991-05-31 1994-04-12 Seiko Epson Corporation Piezoelectric oscillator having reduced radiation of higher harmonics

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