Sampling filter

Details Sampling filter Sampling filter

2011-07-12

2011-07-12

Nguyen, Lee (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

C327S554000, C333S173000

Reexamination Certificate

active

07979047

ABSTRACT:
The present invention aims at providing a sampling filter capable of changing a filtering characteristic without use of a complicate waveform as a control signal. A sampling filter100has a control section140, a plurality of integrators, and a plurality of switches. An input current is accumulated in a plurality of capacitors in one clock; adds up electric charges accumulated in the integrators in several preceding clocks to one preceding clock; and outputs a result of addition. When electric charges are accumulated in the integrators in each clock, output electric charges can be subjected to, while being weighted, addition by switching an electric current to be input, so that the filtering characteristic is changed.

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patent: 7411444 (2008-08-01), Muhammad et al.
patent: 2009/0021296 (2009-01-01), Miyano et al.
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patent: 1164707 (2001-12-01), None
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International Search Report Dated Mar. 20, 2007.

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