Patent ID: 10574256

Abstract:
This application relates to time-encoding modulators (TEMs). A TEM (100) receives an input signal (SIN) and outputs a time-encoded output signal (SOUT). A filter arrangement (102) receives the input signal and also a feedback signal (SFB) from the TEM output, and generates a filtered signal (SFIL) based, at least in part, on the feedback signal. A comparator (101) receives the filtered signal and outputs a time-encoded signal (SPWM) based at least in part on the filtered signal. The time encoding modulator is operable in a first mode with the filter arrangement configured as an active filter and in a second mode with the filter arrangement configured as a passive filter. The filter arrangement may include an op-amp (103), capacitance (104) and switch network (105). In the first mode the op-amp (103) is enabled, and coupled with the capacitance (104) to provide the active filter. In the second mode the op-amp (103) is disabled and the capacitance coupled to a signal path for the feedback signal to provide a passive filter.