Activation signal output circuit and determination circuit

Details Activation signal output circuit and determination circuit Activation signal output circuit and determination circuit

2007-04-24

2007-04-24

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S075000, C455S333000, C455S334000, C455S313000, C327S478000, C327S490000, C327S113000, C324S085000, C363S052000

Reexamination Certificate

active

10536338

ABSTRACT:
A start signal output circuit having an RF/DC conversion circuit to which radio frequency power (RF) of specified frequency is inputted and from which a direct current potential (DC) is outputted, comprises a detection/amplification circuit210which includes a voltage doubler wave-detector circuit10configured including a sensing diode Q1(Tr34) for sensing the RF power, a differential amplifier including differential pair transistors Tr31and Tr32, and a current mirror circuit. A base current of one Tr31of the differential pair transistors is brought into substantial agreement with a DC component of a current flowing through the sensing diode Q1(Tr34). A total of currents flowing through the differential pair transistors Tr31and Tr32is regulated to a substantially constant value by the current mirror circuit. Thus, the start signal output circuit which is small in size, high in sensitivity and low in power consumption can be realized.

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