Ross D Philip

US Patent:

6166586, Dec 26, 2000

Filed:

Jul 6, 1998

Appl. No.:

9/110371

Inventors:

Hector Sanchez - Cedar Park TX
Ross D. Philip - Houston TX
Lakshmikant Mamileti - Denver CO

Assignee:

Motorola Inc. - Schaumburg IL

International Classification:

G05F 110

US Classification:

327538

Abstract:

A temperature sensor having a process compensated current generator (37) for use in a temperature sensing circuit (35) and a current comparator (40). The current generated in reference current generator (36) provides a complementary distortion to balance the effect introduced by processing into the two circuits which make up temperature dependent current generator (38). The generator generates two currents which are used to measure temperature changes. The generator including both PFET and bipolar devices, where the generator compensates for variations in processing conditions. According to one embodiment, the temperature sensor includes a process compensation generator which provides an indicator as a function of at least one processing parameter and a current generator which adjusts the currents according to the indicator.