Patent ID: 6441693
Filing Date: 2002-08-27
Classification: H03K

Abstract:
A voltage-to-duty cycle converter comprising:a first circuit having a first input to receive the voltage, (Vin), having a second input to receive a second signal and operating to produce a first output in accordance with dV/dt=K1âˆ’K2(Vin) when the second signal has a first value and to produce a second output in accordance with dV/dt=K1âˆ’K2(Vin)âˆ’K3 when the second signal has a second value, where Vin is the input voltage to be converted, K1, K2 and K3 are constants in which K1>K2(Vin) and K3>K1âˆ’K2(Vin); a second circuit having an input to receive the first and second outputs and operating to produce a resultant output which has a first value when receiving the first output and a second value when receiving the second output, the resultant output having a duty cycle that is linear with Vin; and connecting means connecting the resultant output to supply the second input to the first circuit.