Constant-factor delta modulator

A companded delta modulator, employing an adaptation principle that produces voltages fed back to the error point in the coder which are discrete and multivalued, is achieved with just a 1 bit memory and simple signal processing, and is a significant invention. The constant-factor-delta-modulator system described here is an extension of this principle, which gives an improved signal/noise ratio at the output of the decoder and remove an objectionable hunting characteristic. These improvements are acquired due to a slight increase in the complexity of the coder.