Patent ID: 7394283
Filing Date: 2008-07-01
Classification: H03K

Abstract:
1. A method of converting a differentially transmitted signal to a single-ended rail-to-rail output signal, comprising: generating a common mode reference voltage level which varies in relation to at least one of a process used to fabricate a generator of said common mode reference voltage level, a level of a power supply voltage provided to said common mode reference level generator or a temperature at which said common mode reference level generator is operated, said step of generating including applying the output of a first inverter back to an input of the first inverter; receiving a differentially transmitted signal pair including a first input signal and a second input signal; outputting a single-ended output signal representing information carried by the differentially transmitted signal pair using a second inverter to establish an upper rail voltage level and a lower rail voltage level of the single-ended output signal; and controlling a common mode level of the first single-ended output signal in accordance with the common mode reference voltage level, wherein the first inverter tracks variability of the at least one of a process used to fabricate, a power supply voltage or a temperature of the first inverter in a manner representative of variability of a process used to fabricate, a power supply voltage or a temperature of the second inverter.