Title:
SYNCHRONOUS FILTER WITH SWITCHING TYPE CAPACITANCE
Document Type and Number:
Japanese Patent JPS62118631
Kind Code:
A
Abstract:
A synchronous filter for use as a narrow band, band-pass filter comprises a matching circuit receiving a signal to be filtered and supplying that signal to an output connected to filtering paths with switched capacitances connected in parallel. This filter also includes switches for switching the filtering paths, a summing circuit with inputs respectively connected to outputs of the filtering paths and a switch control circuit. Each filtering path has two identical filtering channels, each with a capacitance, connected to the switches. The switching control signals are symmetrical for the two channels of each path and staggered by T/2N. The sampling periods or cycles of the two channels of one path are equal to T/2.
Inventors:
MITSUSHIERU GIGUNUU
Application Number:
JP27169186A
Publication Date:
May 30, 1987
Filing Date:
November 13, 1986
Export Citation:
Assignee:
COMMISSARIAT ENERGIE ATOMIQUE
International Classes:
H03H19/00; (IPC1-7): H03H19/00
Attorney, Agent or Firm:
Tamio Nishiwaki