JPS57121312A - Coupling circuit - Google Patents

Coupling circuit

Info

Publication number
JPS57121312A
JPS57121312A JP767981A JP767981A JPS57121312A JP S57121312 A JPS57121312 A JP S57121312A JP 767981 A JP767981 A JP 767981A JP 767981 A JP767981 A JP 767981A JP S57121312 A JPS57121312 A JP S57121312A
Authority
JP
Japan
Prior art keywords
circuit
capacity
parasitic
parasitic capacity
output
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
JP767981A
Other languages
Japanese (ja)
Inventor
Masaaki Mochizuki
Isamu Shichiro
Masashi Nagano
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 Electronics Corp
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 Electronics Corp, Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electronics Corp
Priority to JP767981A priority Critical patent/JPS57121312A/en
Publication of JPS57121312A publication Critical patent/JPS57121312A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components

Landscapes

  • Filters And Equalizers (AREA)

Abstract

PURPOSE:To prevent the unstable state caused by a parasitic capacity, by providing a resistance between the first circuit, where the output impedance is low, and a capacity which couples the output of the first circuit to the second circuit. CONSTITUTION:In respect to the first circuit 1 and the second circuit 3 which are capacity-coupled by an MOS capacity or junction capacity 13, one terminal, to which a parasitic capacity 14 is added, out of both terminals of the capacity 13 is connected to the first circuit 1, and the first circuit 1 consists of the emitter follower circuit of a low output impedance for the purpose preventing the loss of a signal due to the parasitic capacity 14. Since the parasitic capacity 14 is connected to the emitter of an emitter follower transistor 4 of the first circuit 1, a resistance 19 of about 30-750OMEGA is inserted between an output terminal 7 and the coupling capacity 13 for the purpose of preventing the unstable state due to the parasitic capacity 14.
JP767981A 1981-01-20 1981-01-20 Coupling circuit Pending JPS57121312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP767981A JPS57121312A (en) 1981-01-20 1981-01-20 Coupling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP767981A JPS57121312A (en) 1981-01-20 1981-01-20 Coupling circuit

Publications (1)

Publication Number Publication Date
JPS57121312A true JPS57121312A (en) 1982-07-28

Family

ID=11672470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP767981A Pending JPS57121312A (en) 1981-01-20 1981-01-20 Coupling circuit

Country Status (1)

Country Link
JP (1) JPS57121312A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924147B1 (en) * 1969-09-26 1974-06-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924147B1 (en) * 1969-09-26 1974-06-20

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