Patent ID: 6313691
Filing Date: 2001-11-06
Classification: H03K

Abstract:
Apparatus for adjusting static thresholds of CMOS circuits, the apparatus comprising:a low reference circuit comprising an input, an output and at least one n-channel MOS device having a back gate;a high reference circuit comprising an input, an output and at least one p-channel MOS device having a back gate, the p-channel MOS device being coupled to the n-channel MOS device in a complementary MOS configuration;first feedback means for providing a first control voltage to the back gate of the n-channel MOS device;second feedback means for providing a second control voltage to the back gate of the p-channel MOS device;means for applying the first control voltage to the first feedback means; andmeans for applying the second control voltage to the second feedback means;wherein the output of the low reference circuit is coupled to the first feedback means and the output of the high reference circuit is coupled to the second feedback means.