Wireless terminal device

Wireless terminal device

A level of a base band signal at an input side of a variable gain amplification circuit is detected by a logarithmic amplifier having a wide input voltage range at a start of an operation, a control unit then performs a coarse feedforward control on a gain of the variable gain amplifier based on the...

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Hauptverfasser: ITOH KENJI, MOCHIZUKI MITSURU, MATSUNAMI YOSHINORI, KATSURA TAKATOSHI, ISHIZU FUMIO, FUKUYAMA SHINJIROU, HAYASHI RYOJI, NAGANO HIROAKI
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator ITOH KENJI
MOCHIZUKI MITSURU
MATSUNAMI YOSHINORI
KATSURA TAKATOSHI
ISHIZU FUMIO
FUKUYAMA SHINJIROU
HAYASHI RYOJI
NAGANO HIROAKI
description A level of a base band signal at an input side of a variable gain amplification circuit is detected by a logarithmic amplifier having a wide input voltage range at a start of an operation, a control unit then performs a coarse feedforward control on a gain of the variable gain amplifier based on the detected level and finds a level of an output of an A/D converter by a mean square deriving circuit and inputs the resulting signal to the control unit. Then the control unit performs a fine feedback control on the variable gain amplifier based on the detected level.
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subjects BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title Wireless terminal device
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