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. 08, 1987
Filed:
Dec. 09, 1985
Silvo Stanojevic, Milpitas, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A bipolar switch is disclosed having a near zero standby current characteristic, low output impedance in the 'on' state, and near infinite impedance in the 'off' state. The switch is responsive to a control signal to apply regulated power to a load. The switch includes a turn-on detect circuit which is powered solely from the control signal, and switching circuitry which is powered from a power source but which normally draws no standby current when the switch is in its 'off' state. The switching circuitry includes speed-up circuitry to permit rapid turn-on, circuitry which employs positive feedback to achieve high current gain, and circuitry for rapidly turning off the switch.