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:
Jul. 10, 1979
Filed:
Oct. 19, 1977
Applicant:
Inventors:
Godfrey N Hounsfield, Newark, GB;
Richard G Gillard, Uxbridge, GB;
Assignee:
E M I Limited, Hayes, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
328127 ; 328142 ; 328185 ; 307294 ; 307228 ;
Abstract
A multiple rate discharge circuit is disclosed for application, for example, to an integrator connected to a radiation detector as used in computerized axial tomography. The integrator is charged for a given time and then allowed to discharge at a first, relatively slow, rate for a predetermined time. If, at the expiry of the predetermined time, charge remains in the integrator, the discharge rate is considerably increased. The second-mentioned discharge rate is preferably about eleven times faster than the just-mentioned rate, and the two rates are achieved by the selective connection of resistive discharge paths to the integrator.