High-speed class AB voltage-current convertor with high input-output isolation

A new bipolar push-pull class AB voltage-current convertor, which features high input-output isolation, and is particularly suitable for monolithic IC fabrication, is described. Compared with its standard counterparts it can achieve an isolation improvement of more than an order of magnitude in a wide frequency range. Some SPICE simulation results are reported which demonstrate the effectiveness of the proposed scheme, which is aimed at high-performance baseband analogue signal processing applications.