In this article Samuel reviews existing transimpedance stage configurations, and then introduces an amplifier topology which uses a novel push-pull transimpedance topology. Compared to known standard amplifier configurations, the new circuit offers a substantial improvement in power supply rejection. Furthermore secondary slew rate limits are addressed, and sensitivity to loading from the output buffer is reduced. This makes this amplifier architecture particularly suitable for high quality audio power amplifier designs. Experimental results using model amplifiers are presented. Purchase this issue
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