Title:
FILTER CONTROLLED IN DUTY CYCLE
Document Type and Number:
Japanese Patent JPS5799015
Kind Code:
A
Abstract:
An improved duty cycle controlled filter, wherein a resistance is included in every circuit path that exists between a switch terminal and an amplifier terminal. Such improved filter produces low distortion and has been found to be especially useful in data acquisition circuits of seismic exploration systems.
Inventors:
FURANKURIN DABURIYU MEIYO
MAIRUSU EE SUMISAA
MAIRUSU EE SUMISAA
Application Number:
JP16801181A
Publication Date:
June 19, 1982
Filing Date:
October 22, 1981
Export Citation:
Assignee:
GEOSOURCE INC
International Classes:
H03H11/04; H03H11/08; H03H19/00; (IPC1-7): G01D5/12; G01V1/16; G08C15/00; H03H7/02; H03H11/04; H03H19/00
Domestic Patent References:
| JPS4924337A | 1974-03-04 | |||
| JPS54126445A | 1979-10-01 | |||
| JPS53116052A | 1978-10-11 | |||
| JPS4725174A |