Variable attenuator and wireless communication device

Variable attenuator and wireless communication device

A variable attenuator, used with high frequency, provides large variable attenuation per stage. The variable attenuator includes: a MOSFET having a gate, a drain, a source, and a body; an attenuation control circuit; and a temperature characteristics compensation circuit. The attenuation control cir...

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Hauptverfasser: NAKATANI TOSHIFUMI, MIYAZAKI TAKAHITO
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
TRANSMISSION
WAVEGUIDES
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creator NAKATANI TOSHIFUMI
MIYAZAKI TAKAHITO
description A variable attenuator, used with high frequency, provides large variable attenuation per stage. The variable attenuator includes: a MOSFET having a gate, a drain, a source, and a body; an attenuation control circuit; and a temperature characteristics compensation circuit. The attenuation control circuit supplies a control voltage to the gate, the drain, and the source. The temperature characteristics compensation circuit supplies a temperature compensation voltage to the body. An input terminal and an output terminal are connected to the drain and the source of the MOSFET. The temperature characteristics compensation circuit, in accordance with an operating temperature of the MOSFET, controls a voltage to be supplied to the body and adjusts, based on a relation between a body voltage and a gate voltage, a resistance value of a current flowing between the input terminal and the output terminal.
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subjects BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
TRANSMISSION
WAVEGUIDES
title Variable attenuator and wireless communication device
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