Title:
SAMPLING FILTER
Document Type and Number:
Japanese Patent JPS6471314
Kind Code:
A
Abstract:
PURPOSE: To simplify the configuration by providing an upstream switching means and a downstream switching means for a basic cell. CONSTITUTION: A switched capacitor sampling filter is composed of a basic cell 2, upstream switching means 4 and downstream switching means 6. The cell 2 is constituted around a differential amplifier A1 and operated like a low-pass type switched capacitor sampling filter. The upstream switching means 4 is provided with switches I3, and I4, which are connected to the positive and negative terminals of the cell 2, opened/closed under the control of a clock frequency F2 and its cycle is the double frequency of a clock signal at the cell 2. The downstream switching means 6 is connected to an output from the differential amplifier Al of the cell 2, switches I5 and I6 have the same frequency as the signal F2, and it is opened/closed under the control of a clock signal at a frequency F3 offset from that frequency just for a half cycle. Thus, the upstream and downstream means can be related to the cell 2 in order to provide a high-pass filter.
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Inventors:
MOHAMEDO SAMEE TAUFUIKU
PATORISU SEN
PATORISU SEN
Application Number:
JP21348088A
Publication Date:
March 16, 1989
Filing Date:
August 26, 1988
Export Citation:
Assignee:
CENTRE NAT ETD TELECOMM
International Classes:
H03H19/00; (IPC1-7): H03H19/00
Attorney, Agent or Firm:
Ryuyoshi Abe (3 outside)
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