Patent ID: 7627053
Filing Date: 2009-12-01
Classification: H03K

Abstract:
1. A frequency-to-current converter comprising: a one-shot unit including: a comparator having a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal receives a reference voltage and the second input terminal receives a charging current; a first capacitor that is coupled to the second input terminal of the comparator; a flip-flop having a first input terminal and a second input terminal, wherein the first input terminal of the flip-flop is coupled to the output terminal of the comparator and the second input terminal of the flip-flop receives a clock signal; and a first switch that is coupled to the second input terminal of the comparator, wherein the first switch is actuated and deactuated by a signal output from the flip-flop; an averaging unit wherein, the averaging unit further comprises: a voltage-to-current unit that is coupled to the averaging unit.