1. Azcona, C., Calvo, B., Medrano, N., Bayo, A., Celma, S.: A 12-b enhanced input range on-chip quasi-digital converter with temperature compensation. IEEE Trans. Circuits Syst. II 58(3), 164–168 (2011)
2. Baker, R.J., Li, H.W., Boyee, D.E.: CMOS Circuit Design, Layout & Simulation. IEEE Press, New York (1997)
3. Blalock, B.J., Allen, P.E.: A low-voltage, bulk-driven MOSFET current mirror for CMOS. In: Proceedings of the 1995 IEEE International Symposium on Technology, Circuits and Systems, (ISCAS ’95), vol. 3, pp. 1972–1975. Seattle, Washington, 30 April to 3 May 1995 (1995)
4. Cai, S.S.: Temperature-stable voltage-to-frequency converters. Master Thesis, University of Alberta, Canada (1995)
5. Calvo, B., Medrano, N., Celma, S.: A full-scale CMOS voltage-to-frequency converter for WSN signal conditioning. In: Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS’10), pp. 3088–3091. Paris, 30 May to 2 June 2010 (2010)