High gain and low the pulse duration modulation digital-analog converter which possesses gain mode

摘要

(57) Abstract The pulse duration modulation digital-analog converter (10) responding to digital control value (35), substitutes low ardently with high gain mode and gain mode. The converter the self-excitation roll over counter (45), includes the base register (55) and the comparator (60). Impulse from the comparator is split by two paths, on the one hand path includes the switch (20), is sent in the multiple resistant elements which are jointed to the common output node (91). Depending on the state of the switch, becomes the one part of that of it is either whether output value of network follows to the entry duty cycle or output impedance without changing. In order to form the low-pass filter in order to generate the analog ripple mark, the output node may be jointed by capacity element (C1).