Op amps are among the most-used components in electronic design. Their performance is important and is often measured in terms of gain, bandwidth, power consumption, and chip area. Although BJT amplifiers can achieve high gains and bandwidths, they tend to consume a lot of power. CMOS amplifiers utilizing the strong inversion region alone use less power than BJT amplifiers, but generally have lower gains and bandwidths. When CMOS SPICE models were improved to accurately simulate all regions of inversion, researchers began to test the performance of amplifiers operating in the weak and moderate inversion regions. Previous work had dealt with exploring the parameters of composite cascode stages, including inversion coefficients. This thesis extends the work to include conventional cascode stages and presents an efficient method for exploring design parameters. A high-gain (137.7 dB), low power (4.347 µW) operational amplifier based on the conventional cascode stage is presented.
College and Department
Ira A. Fulton College of Engineering and Technology; Electrical and Computer Engineering
BYU ScholarsArchive Citation
Cahill, Kurtis Daniel, "Subthreshold Op Amp Design Based on the Conventional Cascode Stage" (2013). All Theses and Dissertations. 3611.
subthreshold, CMOS, circuit, low-power, high-gain, inversion coeffi cient