Patent ID: 7965132

Claim:
A transistor circuit, comprising: a first output transistor; a second output transistor, wherein the first and second output transistors are arranged to provide an output signal to a common output of the transistor circuit; and a switch arrangement coupling an output of the first output transistor and an output of the second output transistor to the common output in sequence, wherein the first and second output transistors are controlled to provide the same steady state output; wherein the switch arrangement is adapted such that when the output of the first output transistor is coupled to the common output, changes in drive conditions voltage of the first output transistor are isolated from the second output transistor, and wherein the transistor circuit comprises a current sampling circuit, wherein: the first output transistor comprises a current sampling transistor sampling a current, the second output transistor comprises a transistor delivering a current output, and the second output transistor is coupled in parallel with the first output transistor, the transistor circuit further comprises a first transistor gate-source capacitance, the switch arrangement is selectively coupling a gate voltage of the first output transistor to a gate of the second output transistor, and the switch arrangement comprises a coupling switch which is open to prevent changes in gate-source voltage of the first output transistor being coupled to the second output transistor when these changes do not relate to the current sampled by the first output transistor, and the coupling switch is closed to transfer the gate voltage to the first transistor gate-source capacitance.