Abstract: A system and method for minimizing non-linearity errors induced in output drive voltage of a transmitter circuit due to on-chip process, voltage, and temperature (PVT) variations. The system including an oscillator for converting an input reference bias voltage into a clock output signal, where the input reference bias voltage varies in response to PVT variations. Also included is a counter for counting the clock output signal and generating a count value corresponding to the clock output of the oscillator. A comparison module operatively coupled to the counter compares the count value with a pre-simulated count value to generate an error signal. Based on the error signal generated by the comparison module, a correction logic adjusts an output drive signal of the transmitter circuit making it immune to PVT variations.

Abstract: A system and method for minimizing non-linearity errors induced in output drive voltage of a transmitter circuit due to on-chip process, voltage, and temperature (PVT) variations. The system including an oscillator for converting an input reference bias voltage into a clock output signal, where the input reference bias voltage varies in response to PVT variations. Also included is a counter for counting the clock output signal and generating a count value corresponding to the clock output of the oscillator. A comparison module operatively coupled to the counter compares the count value with a pre-simulated count value to generate an error signal. Based on the error signal generated by the comparison module, a correction logic adjusts an output drive signal of the transmitter circuit making it immune to PVT variations.

Abstract: A CMOS voltage reference circuit for a low voltage (1v), low power supply application is described. The circuit achieves a temperature coefficient of 31 ppm for a relatively large temperature range of ?40 C to 125 C. A combination of subthreshold current characteristics and moderate inversion operation of MOSFET's are utilized in conjunction to achieve a fairly stable temperature independent output voltage reference (VREF) from the circuit.