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. 27, 1994
Filed:
Mar. 30, 1993
Daniel A Seligson, Palo Alto, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A digital-to-analog converter includes a plurality of electrically programmable floating gate transistors, each having a electrically programmable threshold voltage. Each of the transistors has its source coupled to ground, its control gate coupled to an output node, and its drain coupled to the output node via one of a plurality of switching circuits. The output node is coupled to a voltage source via a load circuit. An input circuit decodes a digital input signal to selectively generate one of a plurality of control signals at a time in accordance with the digital input signal. Each of the control signals is for one of the switching circuits. When a transistor is coupled to the output node, the voltage level of the output node is equal to the threshold voltage of that transistor. An analog-to-digital converter includes a plurality of electrically programmable floating gate transistors, each having a electrically programmable threshold voltage. Each of the transistors has its source coupled to ground, its control gate coupled to an input analog voltage, and its drain coupled one of a plurality of output nodes. Each of the output nodes is coupled to the voltage source via its respective load circuit. The output circuit generates a digital output signal in accordance with the number of the transistors that are caused to be conducting by the input analog voltage.