1. Franca, J.E., and Tsividis, Y.: ‘Design of analog-digital VLSI circuits for telecommunications and signal processing’, (Prentice Hall 1993),2nd edn.
2. Johns, D.A., and Martin, K.: ‘Analog integrated circuit design’, (John Wiley & Sons Inc. 1997)
3. Schaumann, R., and Van Valkenburg, V.: ‘Design of analog filters’, (Oxford University Press 2001)
4. Low-voltage pseudo-differential transconductor with improved tunability–linearity trade-off