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:
Mar. 23, 2004
Filed:
Jan. 07, 2002
Terence J. Murphy, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A circuit ( ) and method are provided to create a drive voltage that is linearly proportional to a position of a movable member ( ) of an electrostatic actuator device ( ) that is positioned by a voltage ( ) applied thereto. The circuit ( ) has a sensor ( ) to sense a position of the movable member ( ) from a reference position (d ) to provide an analog position indicating signal. An analog-to-digital converter (ADC) ( ) receives the analog position indicating signal and converts it to a digital position indicating signal. A digital signal processor (DSP) ( ), programmed to convert the digital position indicating signal into a digital signal that is linearly proportional to the position of the movable member, receives the digital position indicating signal. A digital-to-analog converter (DAC) ( ) receives the digital signal that is linearly proportional to the position of the movable member for producing a linear analog positioning command, and a voltage amplifier ( ) receives the linear analog positioning command to produce a position voltage and for application to the movable member ( ).