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:
Dec. 19, 1978
Filed:
Oct. 13, 1977
Mukesh P Patel, Manassas, VA (US);
Huo-Bing Yin, Potomac, MD (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An improved bucket brigade circuit is disclosed having an improved transfer efficiency and dynamic range. Conventional bucket brigade circuits consist of a chain of storage capacitors and charge transfer circuits functioning as an analog shift register. Due to the nodal capacitance at the first load of prior art circuits, the charge thereon cannot be maintained at an optimum level because of voltage pull-back and charge redistribution during the fall time of the clock pulse. The invention disclosed herein provides an additional capacitor connecting the first node of the circuit to the inverse of the clock waveform, thereby eliminating the voltage pull-back and charge redistribution problem, resulting in an improved charge transfer efficiency and dynamic range for the circuit.