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. 25, 1984
Filed:
Nov. 17, 1982
Jerry D Moench, Austin, TX (US);
Frank A Miller, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A Schmitt trigger uses a switched high gain MOS transistor coupled to a control node for speed but a low gain transistor to establish a control voltage on the control node to minimize current flow. In one mode the high gain transistor is switched off to allow the control node to increase in voltage. The low gain transistor limits the voltage on the control node by drawing current therefrom. Such current drawing is delayed in time to avoid reducing the initial rate of increase in voltage on the control node. By limiting the voltage on the control node, the charge stored is reduced thereby reducing effective input capacitance. Additionally, speed is increased when the high gain transistor is turned on because the voltage on the control node does not have to be reduced as far.