Front-end circuit

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11258521
APP PUB NO 20200412458A1
SERIAL NO

17021496

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A front-end circuit is used to test an RF signal from an RF device. The RF signal is generated by modulating a carrier signal having a carrier frequency with a wideband baseband signal. A variable frequency oscillator generates a local signal having a variable local frequency. The first frequency mixer frequency mixes a local signal and an RF signal to generate an IF signal having a frequency. A band-pass type first filter filters the IF signal. The local frequency can be selected from a plurality of frequencies having a frequency interval equal to or narrower than a bandwidth of the first filter.

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Patent Owner(s)

  • ADVANTEST CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Asami, Koji Tokyo, JP 41 305
Kudo, Takahiro Tokyo, JP 63 1365

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