US 6,981,381 B1
Linear thermoelectric device driver
Ching Wang, Austin, Tex. (US); Robert M. Bartel, Hillsboro, Tex. (US); and Hans W. Klein, Danville, Calif. (US)
Assigned to Lattice Semiconductor Corp., Hillsboro, Oreg. (US)
Filed on Dec. 16, 2003, as Appl. No. 10/737,514.
Int. Cl. F25B 21/02 (2006.01)
U.S. Cl. 62—3.2 19 Claims
OG exemplary drawing
 
1. A circuit comprising:
a comparator operable to receive an input signal and a reference signal and to provide an output signal to at least one of a first switch and a second switch coupled to a thermoelectric cooler;
a first amplifier operable to receive the input signal and an error signal and to provide a control signal to a third switch coupled to the thermoelectric cooler; and
a second amplifier operable to receive an inverse of the input signal and the error signal and to provide a control signal to a fourth switch coupled to the thermoelectric cooler.