Integrated programmable operational amplifiers with improved characteristics

A semi-custom integrated circuit featuring digitally programmable operational amplifiers is presented. The OP AMPs realized are based on the composite OP AMPs, previously introduced by the authors and known for their extended bandwidth and reduced active and passive sensitivities. For proof of concept, a small chip was manufactured using the Ferranti Interdesign´s CMOS Monochip prototype. A 136 by 185 mils chip containing 200 transistors, four capacitors, and 10 resistors was constructed in a 24 pin package. Experimental results of the prototype chip verified the design concept that was demonstrated theoretically and using SPICE simulation. The results clearly demonstrate the enhanced characteristics of these family of composite OP AMPs when utilized in different applications