Patent ID: 6114913
Filing Date: 2000-09-05
Classification: H03F

Abstract:
A transimpedance amplifier comprising:a semiconductor device having first and second electrodes and a control electrode, the control electrode being coupled to an input for the transimpedance amplifier to control the current flow from the first to the second electrode through the semiconductor device responsive to the input current in the transimpedance amplifier input;a resistor coupled to the first electrode and having a current through the resistor also flowing through the first and second electrodes of the semiconductor device, the current through the resistor providing a transimpedance amplifier output voltage responsive to the current in the transimpedance amplifier input; and,a boost current source coupled to the second electrode, the boost current source providing an additional current component through the first and second electrodes of the semiconductor device, which additional current component does not flow through the resistor and which additional current component is substantially independent of the instantaneous input current.