CPC H03M 1/1245 (2013.01) [H03H 17/02 (2013.01)] | 9 Claims |
1. A low power modulator with a VCO quantizer comprising:
an integrator converting an input current to a voltage;
a quantizer converting the converted voltage to digital information;
a filter unit filtering the converted digital information;
a DAC converting the filtered digital information into a feedback current; and
a controller calculating a digital information output based on a difference value between the input current and the feedback current for each sampling time,
wherein the filter unit comprises a digital Infinite Impulse Response (IIR) filter, and
wherein the filter unit is configured to receive a signal of the converted digital information from the quantizer, process a first signal passing through the digital IIR filter, process a second signal without passing through the digital IIR filter, combine the first signal and the second signal to transmit the combined signal to the DAC as the digital information.
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