Patent ID: 7812569

Claim:
A system for measuring a voltage, the system comprising: a time encoding circuit in electrical communication with the voltage, the time encoding circuit generating a time encoded signal corresponding to the voltage, the time encoding circuit includes a switch, an integrator, and a comparator, the switch generating a switched signal based on the voltage, the switch being in communication with the integrator through a first resistor to provide the switched signal, a first side of the first resistor being in communication with the switch and a second side of the first resistor being in communication with the integrator, the integrator integrating the switched signal to generate an integrated signal, the integrator being in communication with an input of the comparator to provide the integrated signal, the integrator including a capacitor, a first side of the capacitor being in communication with the input of the comparator and a second side of the capacitor being in communication with the second side of the first resistor, the comparator receiving the integrated signal to generate the time encoded signal, a first feedback loop between being connected between an output of the comparator and the switch causing the switch to oscillate based on the time encoded signal; a controller in electrical communication with the time encoding circuit, the controller being configured to determine the voltage based on the time encoded signal; wherein a second feedback loop includes a transistor, the output of the comparator is connected to a gate of the transistor and an output of the transistor is connected to the negative input of the comparator.