Patent ID: 8536932
Filing Date: 2013-09-17
Classification: H03K,H03L

Abstract:
1. A temperature compensation circuit, comprising: a temperature coefficient generator configured to generate a proportional-to-absolute-temperature (ptat) signal and a negatively-proportional-to-absolute-temperature (ntat) signal; a first subtractor configured to subtract a first signal that is based at least on the ptat signal from a second signal that is based at least on the ntat signal; a second subtractor configured to subtract a third signal that is based at least on the ntat signal from a fourth signal that is based at least on the ptat signal; a first programmable element configured to multiply at a first programmable ratio a fifth signal that is based at least on the subtraction of the first signal from the second signal, the fifth signal having a first temperature coefficient across a first range of temperatures; a second programmable element configured to multiply at a second programmable ratio a sixth signal that is based at least on the subtraction of the third signal from the fourth signal, the sixth signal having a second temperature coefficient across a second range of temperatures; and a combiner configured to: