TRANSMITTER AND RADIO TELEPHONE SYSTEM

TRANSMITTER AND RADIO TELEPHONE SYSTEM

PROBLEM TO BE SOLVED: To prevent the fault of a circuit system to amplify power of a high frequency signal in advance. SOLUTION: In the case that a pre-stage of an amplifier 4, e.g. a band pass filter 1 or a driver 2 is faulty and the input to the amplifier 4 is extremely small, since a voltage VID...

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Hauptverfasser: OTAKA YUKIHIDE, KUZUHARA AKIRA, FURUYA MASARU, TAKEUCHI NOBUYUKI
Format: Patent
Sprache:eng
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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creator OTAKA YUKIHIDE
KUZUHARA AKIRA
FURUYA MASARU
TAKEUCHI NOBUYUKI
description PROBLEM TO BE SOLVED: To prevent the fault of a circuit system to amplify power of a high frequency signal in advance. SOLUTION: In the case that a pre-stage of an amplifier 4, e.g. a band pass filter 1 or a driver 2 is faulty and the input to the amplifier 4 is extremely small, since a voltage VID is smaller than a voltage VP1 , application of an operation use voltage VCC to a power supply terminal of a comparator 6 is inhibited. Thus, the operation of the comparator 6 is stopped and application of the control voltage VC from the comparator 6 to the amplifier 4 is inhibited. Thus, the operation of the amplifier 4 is stopped and no excess current flows to the amplifier 4 and then faults/deterioration in the amplifier 4 are prevented in advance.
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
title TRANSMITTER AND RADIO TELEPHONE SYSTEM
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