Abstract: A high-accuracy linear amplifier is disclosed for sinking or sourcing current to or from a load. The linear amplifier includes input circuitry for receiving a predetermined input signal and rectifier circuitry. The rectifier circuitry is disposed at the output of the input circuitry and is operative in response to the input signal to generate a source/sink command signal. Output stage circuitry is coupled to the rectifier circuitry and includes a current sink transistor and a current source transistor. The output stage circuitry is responsive to the command signal to sink or source current through one of the respective transistors. The amplifier further includes feedback circuitry coupled between the output of the output stage circuitry and the input circuitry to provide an error signal for modifying the input signal. Bias circuitry maintains the non-conducting transistor in an on state during the sourcing or sinking of current.

Abstract: A high-accuracy linear amplifier is disclosed for sinking or sourcing current to or from a load. The linear amplifier includes input circuitry for receiving a predetermined input signal and rectifier circuitry. The rectifier circuitry is disposed at the output of the input circuitry and is operative in response to the input signal to generate a source/sink command signal. Output stage circuitry is coupled to the rectifier circuitry and includes a current sink transistor and a current source transistor. The output stage circuitry is responsive to the command signal to sink or source current through one of the respective transistors. The amplifier further includes feedback circuitry coupled between the output of the output stage circuitry and the input circuitry to provide an error signal for modifying the input signal. Bias circuitry maintains the non-conducting transistor in an on state during the sourcing or sinking of current.