JPS6436105A - Amplifier feedback type oscillation circuit - Google Patents

Amplifier feedback type oscillation circuit

Info

Publication number
JPS6436105A
JPS6436105A JP19009987A JP19009987A JPS6436105A JP S6436105 A JPS6436105 A JP S6436105A JP 19009987 A JP19009987 A JP 19009987A JP 19009987 A JP19009987 A JP 19009987A JP S6436105 A JPS6436105 A JP S6436105A
Authority
JP
Japan
Prior art keywords
oscillation circuit
circuit
improved
amplifier
oscillation
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
JP19009987A
Other languages
Japanese (ja)
Inventor
Yutaka Tagaya
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP19009987A priority Critical patent/JPS6436105A/en
Publication of JPS6436105A publication Critical patent/JPS6436105A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To improve the QL of the entire oscillation circuit and to attain the improvement of an oscillated output signal in the phase noise characteristic and a broad band application of the oscillation circuit by providing a transformer respectively to the input and output of a feedback circuit. CONSTITUTION:Transformers 4,5 are inserted before and after the feedback circuit 6. Thus, the input impedance and the output impedance of an amplifier 1 are reduced to a multiple of 1/n<2> with the ratio of number of turns of the transformers 4, 5 is 1:n when viewed from the side of the amplifier. Thus, the entire QL of the oscillation circuit is improved by a multiple of n<2>, the frequency selectivity is improved and the phase noise characteristic of the oscillation output signal is improved. Moreover, since the oscillated frequency is made nearly coincident with the resonance frequency of the resonance circuit, the oscillation circuit with broad band is realized.
JP19009987A 1987-07-31 1987-07-31 Amplifier feedback type oscillation circuit Pending JPS6436105A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19009987A JPS6436105A (en) 1987-07-31 1987-07-31 Amplifier feedback type oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19009987A JPS6436105A (en) 1987-07-31 1987-07-31 Amplifier feedback type oscillation circuit

Publications (1)

Publication Number Publication Date
JPS6436105A true JPS6436105A (en) 1989-02-07

Family

ID=16252356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19009987A Pending JPS6436105A (en) 1987-07-31 1987-07-31 Amplifier feedback type oscillation circuit

Country Status (1)

Country Link
JP (1) JPS6436105A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5698003A (en) * 1979-12-29 1981-08-07 Matsushita Electric Ind Co Ltd Oscillating device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5698003A (en) * 1979-12-29 1981-08-07 Matsushita Electric Ind Co Ltd Oscillating device

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