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:
Sep. 01, 2009
Filed:
Dec. 04, 2006
Jonathan W. Celani, Hudson, NH (US);
Jonathan W. Celani, Hudson, NH (US);
Linear Technology Corporation, Milpitas, CA (US);
Abstract
A controlled endpoint sawtooth waveform generator and methodology is implemented by a circuit that uses charge sharing between capacitors to produce a sawtooth having one or both endpoints that are suspended between the power supply rail and ground. The circuit may comprise a timing capacitor to which a charging source is coupled, and a switched capacitor coupled to the timing capacitor through a first controlled switch and to a source of switched capacitor reference voltage through a second controlled switch. The first and second controlled switches are responsive to a control signal, that may be internally or externally provided, for mutually exclusive switch operation. An output sawtooth thereby is produced having one endpoint determined by a fixed voltage source and the other endpoint in accord with the capacitance ratio of the timing and switched capacitors.