A Nonlinear Encoder

A time-base encoding system is described which can be adapted to high precision without reaching a point of inaccurate digital representation of the reference voltage. The system uses a sinusoidal reference voltage and a counter which is capable of accumulating pulses in such a way that the encoder output is an accurate digital representation of the reference during the encoding interval. There is no need for sample and hold circuitry in this particular encoder. The design of the comparator, the clock inhibit circuit, and the nonlinear counter are discussed.