Patent ID: 8164321

Claim:
A current injector circuit comprising: a clock signal modulating circuit having a first input for receiving a clock signal, a second input for receiving a control signal, and an output; a first current injector having an input coupled to the output of the clock signal modulating circuit, and an output coupled to a power supply voltage terminal for providing a first predetermined current; a feedback circuit coupled between the power supply voltage terminal and a second input of the clock modulating circuit, the feedback circuit for providing the control signal for controlling the clock modulating circuit, and in response, the first current injector for providing the first predetermined current; a first input signal modulating circuit having a first input for receiving an input signal, a second input for receiving the control signal, and an output; and a second current injector having an input coupled to the output of the first input signal modulating circuit, and an output for providing a second predetermined current.