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:
Nov. 11, 1997
Filed:
May. 09, 1996
Adrian P Brokaw, Burlington, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A single-loop voltage regulator controller includes a high-gain transconductance amplifier that accommodates common mode inputs as low as its negative supply rail. The input stage of the amplifier produces a proportional to absoulte temperature (PTAT) input offset voltage. The transconductance amplifier's inverting input is connected to the circuit common, or negative supply rail, and a tap from a feedback network is connected to the amplifier's noninverting input. The feedback network provides, at this tap, a PTAT measure of the regulator's regulated output. The amplifier's output is connected to drive a noninverting driver which, in turn, is connected to drive the control terminal of the regulator's pass transistor. A compensation capacitor connected between the amplifier's output and the regulated output terminal ensures the regulator's stability even for relatively low level load impedances.