ABSTRACT
The folded cascode amplifier is used in the circuit structure. This two-stage op-amp can be seen as a cascade of folded cascode circuit and a simple amplifier. It uses Miller compensation capacitors. The design requires a gain of 100 dB or more, so it is assigned to the two-stage amplifier, as shown in Equation 1 and Equation 2. The circuit structure is shown in Figure 1.
In this paper, a circuit block, which itself generates a fixed bias voltage, is used as an operational amplifier to provide a bias voltage. VBIAS1, VBIAS2, VBIAS3, and VBIAS4 of Figure 1 are given by a voltage bias circuit. The bias circuit is shown in Figure 2. IBIAS1 and
