Title:
PASSIVE SWITCHED-CAPACITOR FILTERS CONFORMING TO POWER CONSTRAINT
Document Type and Number:
Japanese Patent JP2015201867
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide passive switched-capacitor (PSC) filters that occupy smaller area and consume less power.SOLUTION: A PSC filter 1000 implements a second-order infinite impulse response (IIR) filter with two complex first-order IIR sections. Each complex first-order IIR section includes three sets of capacitors. A first set of capacitors receives a real input signal and an imaginary delayed signal, stores and shares electrical charges, and provides a real filtered signal. A second set of capacitors receives an imaginary input signal and a real delayed signal, stores and shares electrical charges, and provides an imaginary filtered signal. A third set of capacitors receives the real and imaginary filtered signals, stores and shares electrical charges, and provides the real and imaginary delayed signals.
Inventors:
PAN CHENGZHI
BURKE JOSEPH
BURKE JOSEPH
Application Number:
JP2015111601A
Publication Date:
November 12, 2015
Filing Date:
June 01, 2015
Export Citation:
Assignee:
QUALCOMM INC
International Classes:
H03H19/00; H03H17/04; H03H17/06; H03H17/08
Attorney, Agent or Firm:
Kurata Masatoshi
Yoshihiro Fukuhara
Morisezo Iseki
Okumura Motohiro
Yoshihiro Fukuhara
Morisezo Iseki
Okumura Motohiro