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:
Jan. 12, 2016
Filed:
Mar. 07, 2013
Qualcomm Incorporated, San Diego, CA (US);
Burt L. Price, Raleigh, NC (US);
Yeshwant Nagaraj Kolla, Wake Forest, NC (US);
Dhaval R. Shah, Raleigh, NC (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A switchable bias current biases, in an operational state, a differential amplifier with a full-slew bias current. A system on/off signal transitions from an operational state to a power-down state. The transition disables the differential amplifier and switches the switchable bias current to a reduced slew bias current. The system on/off signal transitions from the power-down state to the operational state, the differential amplifier is enabled, and the switchable bias current is delayed, by a reduced slew duration, from switching to the full-slew bias current. The enabled differential amplifier slews toward a reference voltage at a reduced slew rate caused by the reduced slew bias current. The switchable bias current, after the reduced slew duration, switches to the full-slew bias current. Optionally, a regulated pass gate is disabled in response to the system on/off signal transitioning from the operational state to the power-down state.