Abstract
A cascade structure of six proposed signal-current enhancers is applied to a standard operational transconductance amplifier (OTA) to improve its gain-bandwidth (GBW) product, slew rate (SR), and voltage gain through significant enhancements of the small-signal and transient output currents from the proposed enhancers. The proposed hybrid OTA is implemented in a standard $\text{0.13}\;\upmu\text{m}$ CMOS technology, with an active chip area of $\text{0.0027}\;\text{mm}^{2}$ . Working under a 0.7 V supply and as proven by the measurement results, the resultant OTA when driving an output capacitor of 15 nF attained ${\sim}\text{100}\;\text{dB}$ gain, a GBW of 1.46 MHz, and an SR of $\text{0.47}\;\text{V}/\upmu\text{s}$ , consuming only $\text{24}\;\upmu\text{A}$ of current and requiring no compensation capacitor.
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