Inverter-Based Switched Current Programmable Sampled and Hold Amplifier for LV Applications

In this paper, a programmable current mode Sample Hold (SH) circuit is proposed. The proposed SH is based on the Switched Inverter technique [1], [2]. The circuit employs the conventional CMOS inverter operating as I/V and V/I converter with the current mirror concept. In the proposed circuit, the switches are worked at fixed channel voltage therefore, the switch conduction gap can be overcome. Moreover, the introduced cell structure presents class-AB operation which has low power ability consumption. Delay unit with a fully programmable coefficient (positive and negative), which is employed in FIR filter for channel equalizer or sampled data integrator for analog circuit designing. The proposed circuits are implemented by using a single CMOS inverter and capacitor, therefore, achieving the ability of a Field Programmable Analog Array (FPAA) circuit. The circuit is designed to be fabricated in 130 nm CMOS technology. The designed circuits (SH, delay unit, and integrator) are worked under 750 mV as a supply voltage with optimum low power consumption.