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:
Nov. 30, 1976
Filed:
Jun. 30, 1975
Applicant:
Inventors:
Edward Stanley Hoyt, South Burlington, VT (US);
Joseph Zauchner, South Hero, VT (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; G01R / ;
U.S. Cl.
CPC ...
307251 ; 307279 ; 3241 / ;
Abstract
A high impedance voltage probe with excellent high frequency response and extremely light loading of the circuit under test. The probe uses an IGFET input device having its source connected to a constant current source and to an amplifying device, and its drain connected to a variable voltage source. The output of the amplifying device is connected to a constant current source, to a non-linear voltage translating device and to an output terminal. The voltage translating device is also connected to the variable current source.