Digital transmission technology l: source encoding - Signals, Processes, and Systems - page 348

Schreiber

Recorder

Signal S&H

Differenz Trigger 1BitADC

Signal S&H

Difference T rigger 1B i tA DC

Tiefpass

Lowpass

Offset Summe Verzögerung

Offset Sum Delay

Illustration 228: Δ -demodulation or Δ− decoding

Here you see in addition to the signals present in the -modulator the final analog signal recoverd in the

receiver. As described in the text of Illustration 227 the output signal of the digital integrator and the time
and value discrete signal recoverd in the receiver must be identical. For this reason there is no receiver in
the DASYLab circuit. The latter signal must only be passed to an analog lowpass.

Δ

Note: the triangular input signal ought to look like the recoverd (filtered) signal. It ought to have been
band-limited (Sampling Principle).