Title:
SWITCHED CAPACITOR FILTER
Document Type and Number:
Japanese Patent JPH01160110
Kind Code:
A
Abstract:
PURPOSE:To realize a highly accurate filter by using an output or an adder means as the final output so as to attain low sensitivity. CONSTITUTION:Voltages (V2<1>, V2<2>, V1<3>, V1<4>) at the output side of an SC filter circuit are added sequentially to form a final filter output and the addition including the delay for each period is applied. Thus, the approximation in an input section of the SC filter circuit is compensated and the tight design based on the twin linear conversion as the entire circuit is attained. That is, the input and output sides are replaced in time division to generate two states, the outputs of both the states are added to form the final output of the SC filter circuit. Thus, the worst sensitivity at the zero frequency of the SC filter is made zero to form low sensitivity thereby realizing the highly accurate filter.
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Inventors:
MASUDA SHINJI
Application Number:
JP31816487A
Publication Date:
June 23, 1989
Filing Date:
December 16, 1987
Export Citation:
Assignee:
NEC CORP
International Classes:
H03H19/00; (IPC1-7): H03H19/00
Attorney, Agent or Firm:
Yanagi Shin Kawai