Title :
Input common-mode adapter using multiple-input floating-gate devices
Author :
Kim, Young-Sik ; Sohn, K.-S. ; Baek, Ki-Ju ; Kim, Nam-Soo ; Al-Sarawi, Said F. ; Abbott, Derek
Author_Institution :
Dept. of Semicond. Eng., Chungbuk Nat. Univ., Cheongju, South Korea
Abstract :
A new common-mode (CM) feedback circuit for differential amplifiers that uses floating-gate devices is demonstrated. The circuit, which consists of a floating-gate CM voltage detector and a two-stage amplifier, generates a CM correction voltage to stabilise the floating-gate voltage of a differential amplifier against the input CM voltage. The proposed method achieves a rail-to-rail CM swing and a transconductance that is independent of the input CM voltage.
Keywords :
analogue integrated circuits; circuit feedback; differential amplifiers; CM correction voltage; analogue IC; common-mode feedback circuit; differential amplifiers; floating-gate CM voltage detector; input CM voltage; input common-mode adapter; multiple-input floating-gate devices; rail-to-rail CM swing; transconductance; two-stage amplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.1775
