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This paper presents the small-signal operation of a <inline-formula> <tex-math notation="LaTeX">$g_{\mathrm {m}}$ </tex-math></inline-formula>-boosted inverter-cascode transimpedance amplifier which has not been reported previously and whose comprehensive analysis is not available in any reported article or text-book. A simplified sequential equivalent-circuit method is employed which eliminates the need for complicated circuit analysis techniques. The analysis shows that the gain and the gain-bandwidth of the <inline-formula> <tex-math notation="LaTeX">$g_{\mathrm {m}}$ </tex-math></inline-formula>-boosted inverter-cascode transimpedance-amplifier is enhanced by the gain of the <inline-formula> <tex-math notation="LaTeX">$g_{\mathrm {m}}$ </tex-math></inline-formula>-boosting amplifier. This is due to the increased output impedance of the TIA, and, the reduced input-referred miller-effect capacitance through miller-effect trade-off employing the <inline-formula> <tex-math notation="LaTeX">$g_{\mathrm {m}}$ </tex-math></inline-formula>-boosting loop. To verify the actual performance improvement achieved, circuit simulation results as well as measured experimental results are also provided.

On the gm-Boosted Miller-Effect Minimized Inverter-Cascode Transimpedance Amplifier for Sensor Applications

On the g_m-Boosted Miller-Effect Minimized Inverter-Cascode Transimpedance Amplifier for Sensor Applications