Title:
【発明の名称】帯域炉波器
Document Type and Number:
Japanese Patent JPS6031368
Kind Code:
B2
Abstract:
An improved bandpass filter circuit for selecting a relatively narrow band portion of an input sinusoidal signal. The improved bandpass filter circuit produces an output signal whose phase deviation from the input signal is substantially constant for small variations in the frequency of the input signal. The improved bandpass filter circuit in accordance with the present invention does not use feedback control in its operation and therefore is free from the inherent delay time of a tracking type bandpass filter utilizing feedback control in handling transitory input signals.
Inventors:
KURIHARA HIROSHI
TAKENAKA SADAO
TAKENAKA SADAO
Application Number:
JP10258678A
Publication Date:
July 22, 1985
Filing Date:
August 23, 1978
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H03H7/01; H03H19/00; H04L27/227; (IPC1-7): H03H7/01
Attorney, Agent or Firm:
Koshiro Matsuoka
Previous Patent: An operation control device and a method of an air harmony device
Next Patent: ELECTRONIC STILL CAMERA DEVICE
Next Patent: ELECTRONIC STILL CAMERA DEVICE