Efficient high overdrive transimpedance amplifiers

摘要

Transimpedance amplifiers that provide moderate bandwidth and very large overdrive current capabilities while consuming a minimum amount of power supply current. Existing transimpedance amplifier topologies use a quiescent current somewhat larger than the overdrive current that must be tolerated while the present invention reduces the value of the quiescent current and can tolerate bi-directional overdrive current several times larger than the current consumption of the circuit itself. The preferred embodiment of the invention is arranged such that stability of the circuit is ensured under all operating conditions, including overdrive conditions. Various embodiments are disclosed.