Title:
PROGRAMMABLE FILTER
Document Type and Number:
Japanese Patent JPH02266607
Kind Code:
A
Abstract:
PURPOSE: To set a cut-off frequency variably over a wide range without causing any noise on an output by varying a filter constant in a clock frequency rejection filter.
CONSTITUTION: A filter characteristic (cut-off frequency) of a clock frequency rejection filter 12 is set variably with the changeover of changeover switches 13, 14. Then the frequency band of the filter characteristic of the clock frequency rejection filter 12 is set shifted so as not to be overlapped with the frequency component band included in an output signal of a switched capacitor filter(SCF) 11. Thus, the cut-off frequency of the switched capacitor filter SCF 11 is set variably over a wide range without causing noise in the output.
Inventors:
WAKATA HIDEYUKI
Application Number:
JP8871389A
Publication Date:
October 31, 1990
Filing Date:
April 06, 1989
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H03H19/00; (IPC1-7): H03H19/00
Attorney, Agent or Firm:
Masuo Oiwa (2 outside)
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