Patent ID: 7088172
Filing Date: 2006-08-08
Classification: G05F

Abstract:
1. A configurable voltage bias circuit coupled to control the propagation delay of a logic circuit, the configurable voltage bias circuit comprising: a temperature dependent reference voltage circuit configured to generate a temperature dependent reference voltage that increases as temperature increases; a plurality of resistors connected in series between the temperature dependent reference voltage and a low supply voltage, wherein the plurality of resistors includes a first set of resistors and a second set of resistors; a configurable voltage divider coupled to receive the temperature dependent reference voltage and configured to generate an output supply voltage for the logic circuit, wherein the configurable voltage divider comprises a multiplexer having inputs connected to terminals of the first set of resistors and an output driving the output supply voltage, the multiplexer selecting a portion of the first set of resistors in response to a first control word, the configurable voltage divider including a first configurable resistance and a second configurable resistance having resistance magnitudes that are directly proportional to the number of resistors in the first set of resistors; and a configurable resistance circuit coupled between the configurable voltage divider and the low supply voltage, wherein the configurable resistance circuit comprises a plurality of transistors connected between the low supply voltage and terminals of the second set of resistors, the transistors selecting a portion of the second set of resistors in response to a second control word, the second control word being independent of the first control word, the configurable resistance circuit including a third configurable resistance having a resistance magnitude that is directly proportional to the number of resistors in the third configurable resistance circuit.