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:
Apr. 02, 1991
Filed:
May. 01, 1989
John M Golio, Chandler, AZ (US);
Joseph Staudinger, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A field effect device and circuit suitable for providing an analog output signal having a magnitude which is representative of a digital input code having a sequence of bits. The device includes a plurality of gate electrodes located between an input electrode and an output electrode. The gate electrodes have unequal lengths to provide different gate widths each representative of the magnitude of a portion of an analog signal provided at the output electrode in response to a digital signal of a particular logic state, such as a logical 'one', when applied to any one of the gate electrodes. Thus, the magnitude of the current conducted between the input electrode and the output electrode is responsive to the sum of the widths of the gates receiving the digital signal of a particular logic state.