Patent ID: 8581762
Filing Date: 2013-11-12
Classification: H03M

Abstract:
1. A circuit comprising: a circuit input; a circuit output; a low pass filtering element connected to the circuit input; an integrator connected to receive an output of the low pass filtering element; a quantizer block connected to receive an output of the integrator, wherein the circuit output is connected to receive a quantized output of the quantizer block; and an analog feedback path connected between the quantizer block and the circuit input, the analog feedback path including a digital to analog converter (DAC), wherein the DAC is configured to receive the quantized output of the quantizer block and to generate an analog feedback signal that is combined with a signal received at the circuit input, wherein a transconductance of the quantizer block and the DAC corresponds to a ratio of i) a maximum current input to the DAC to ii) a maximum voltage swing at an input of the quantizer block.