Patent ID: 6844835

Claim:
A DAC cell circuit, comprising: a constant current source for providing a constant current; a first resistor; a second resistor; a first MOSFET having a first source connected to the constant current source, a first drain connected to the first resistor, and a first gate for receiving a first control signal; a second MOSFET having a second source connected to the constant current source and the first source of the first MOSFET, a second drain connected to the second resistor, and a second gate for receiving a second control signal; at least one third MOSFET having a third source and a third drain connected to the first source and first drain of the first MOSFET, respectively, and a third gate for receiving a third control signal; and at least one fourth MOSFET having a fourth source and a fourth drain connected to the second source and second drain of the second MOSFET, respectively, and a fourth gate for receiving a fourth control signal.