Title:
保護回路及びスイッチ保護方法
Document Type and Number:
Japanese Patent JP6570243
Kind Code:
B2
Abstract:
A switch protection circuit includes a discharging circuit and, optionally, a clamping circuit. The discharge circuit operates prior to the switch completing the switching action to discharge capacitance from a signal line of a cable connected to a device under test to a ground voltage. When not discharging, the discharge circuit presents low leakage to a measurement circuit so as not to interfere with such measurement. If present, the clamping circuit clamps a signal line of the cable to a guard structure of the cable so that the discharge circuit can couple both the signal line and the guard structure to ground. The protection circuit operates without significantly worsening low current performance of the measurement instrument.
Inventors:
Matthew A. Holtz
Gregory Sobolewski
Gerold A. Williamson
Gregory Sobolewski
Gerold A. Williamson
Application Number:
JP2014249750A
Publication Date:
September 04, 2019
Filing Date:
December 10, 2014
Export Citation:
Assignee:
Keithley Instruments,LLC
International Classes:
H01H47/00; H01H9/54
Domestic Patent References:
| JP2009500807A |
Foreign References:
| US7864491 |
Attorney, Agent or Firm:
Yamaguchi International Patent Office