VOLTAGE AMPLIFIER FOR WIRELESS TRANSCEIVER IN SENSOR NETWORK

PROBLEM TO BE SOLVED: To provide a voltage amplifier for a wireless transceiver with low power consumption and a great signal amplification factor suppressing through currents in respective inactive and active states, regarding a voltage amplifier of serial connection occupying about 94% in the powe...

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Bibliographic Details
Main Authors MIKAMI SHINJI, OTA CHIKARA, KAWAGUCHI HIROSHI, YOSHIMOTO MASAHIKO
Format Patent
LanguageEnglish
Published 28.08.2008
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
PHYSICS
SIGNALLING
TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILARSIGNALS
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Summary:PROBLEM TO BE SOLVED: To provide a voltage amplifier for a wireless transceiver with low power consumption and a great signal amplification factor suppressing through currents in respective inactive and active states, regarding a voltage amplifier of serial connection occupying about 94% in the power consumption of an incoherent receiver in a sensor network. SOLUTION: A voltage amplifier for a wireless transceiver is constituted of a main amplifier and a sub-amplifier which feeds back an output of the amplifier, wherein a dynamic range of the sub-amplifier is limited to a first voltage Vhand a second voltage Vland when there is no input signal Vin, the dynamic range becomes bistable but if the input signal is changed equal to or larger than an intermediate voltage difference Vabetween first and second voltages, the sub amplifier feeds the signal back to the main amplifier to bring an operating point of the main amplifier to a threshold voltage Vtof the main amplifier. In such a voltage amplifier, a capacitor and a resistor are provided at the input side of the sub-amplifier and an input voltage of the sub amplifier is clamped and fixed at a predetermined voltage Vm. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20070035223