JPS5568745A - Switch circuit - Google Patents

Switch circuit

Info

Publication number
JPS5568745A
JPS5568745A JP14261478A JP14261478A JPS5568745A JP S5568745 A JPS5568745 A JP S5568745A JP 14261478 A JP14261478 A JP 14261478A JP 14261478 A JP14261478 A JP 14261478A JP S5568745 A JPS5568745 A JP S5568745A
Authority
JP
Japan
Prior art keywords
circuit
bias
base
detection output
trq16
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.)
Granted
Application number
JP14261478A
Other languages
Japanese (ja)
Other versions
JPS5919651B2 (en
Inventor
Shigeru Nakajima
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 JP14261478A priority Critical patent/JPS5919651B2/en
Publication of JPS5568745A publication Critical patent/JPS5568745A/en
Publication of JPS5919651B2 publication Critical patent/JPS5919651B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D5/00—Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will

Abstract

PURPOSE:To ensure the excellent output for the FM and AM circuit by extracting the FM detection output with the operation stopped for the constant voltage source for the AM circuit and then lowering the base bias of the transistors such as the IF amplifier circuit or the like for the FM circuit. CONSTITUTION:With opening of band change-over switch d, constant voltage source IV stops the operation. Thus no bias is given to the base of transistor TrQ16, and FM detection output signal is delivered through output terminal (c). On the other hand, with closure of switch (d), source IV starts the operation to give the bias to the base of TrQ16 and thus to turn on the transistor. At the same time, the base bias is lowered down for IF amplifier circuit I plus TrQ5, Q6 and Q7 each to stop each operation, and thus the detection output signal of TrQ14 is delivered through terminal (c). As a result, the excellent output is secured from the FM and AM circuits.
JP14261478A 1978-11-17 1978-11-17 switching circuit Expired JPS5919651B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14261478A JPS5919651B2 (en) 1978-11-17 1978-11-17 switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14261478A JPS5919651B2 (en) 1978-11-17 1978-11-17 switching circuit

Publications (2)

Publication Number Publication Date
JPS5568745A true JPS5568745A (en) 1980-05-23
JPS5919651B2 JPS5919651B2 (en) 1984-05-08

Family

ID=15319416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14261478A Expired JPS5919651B2 (en) 1978-11-17 1978-11-17 switching circuit

Country Status (1)

Country Link
JP (1) JPS5919651B2 (en)

Also Published As

Publication number Publication date
JPS5919651B2 (en) 1984-05-08

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