A novel configurable analog unit architecture

In this paper, a new architecture of configurable analog unit based on switch capacitor technology is presented. The architecture consists of four parts of input expansion, SC building block, self-calibrating OpAmp and clock control. The architecture not only achieves linear analog application such as integrator, gain amplifier, filter, etc., but also can be expediently configured to implementing some nonlinear analog applications. A programming mechanism using two programmable selector for parameter selector and function selector are illustrated for the architecture. The architecture is propitious to utilize configuration and technology mapping. As nonlinear analog application, a voltage control oscillator is implemented. Simulation result with HSPICE shows that for 0.6 μ CMOS process, the relative error of voltage-frequency is less than 0.2%