The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 1989
Filed:
Sep. 11, 1985
Applicant:
Inventor:
Frederick J Wixley, Canterbury, GB;
Assignee:
GEC Avionics Limited, , GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ;
U.S. Cl.
CPC ...
324 / ; 324 725 ; 3241 / ; 3241 / ;
Abstract
An electric circuit testing equipment wherein signals are picked up from a selected point in the circuit by a probe unit (41) capacitively coupled to the selected point and the signals picked up by the probe unit are conditioned by circuits (47 to 61) which produce an output signal corresponding only to signals picked up by the unit from the selected point. The use of a capacitively coupled probe unit reduces the possibility of the unit affecting the operation of the circuit under test while the conditioning of the picked up signals enables the pick-up of unwanted signals to be tolerated. Designs of probe unit to minimize pick-up of unwanted signals are also described.