Title :
A 3rd-Order 235MHz Low-Pass gmC-Filter in 120nm CMOS
Author :
Kolm, Robert ; Zimmermann, Horst
Author_Institution :
Inst. of Electr. Meas. & Circuit Design, Vienna Univ. of Technol.
Abstract :
A 3rd-order continuous-time filter with a cut-off frequency of 235MHz in 120nm CMOS is presented. A linearization technique of an operational transconductance amplifier (OTA) is proposed. The gain of this filter is digitally programmable between 0.5dB and -5dB. The third-harmonic distortion of this filter is -49dB in maximum gain for a 400mV peak-to-peak differential output signal. Two identical filters were implemented on one chip to measure the mismatch which is lower than 0.7 dB in amplitude and 7deg in phase
Keywords :
CMOS integrated circuits; harmonic distortion; linearisation techniques; low-pass filters; operational amplifiers; 120 nm; 235 MHz; CMOS integrated circuit; OTA; continuous-time filter; gmC-filter; linearization technique; low-pass filter; operational transconductance amplifier; third-harmonic distortion; Circuit synthesis; Digital filters; Electric variables measurement; Frequency measurement; Linearity; Linearization techniques; Power supplies; Resistors; Virtual reality; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2006. ESSCIRC 2006. Proceedings of the 32nd European
Conference_Location :
Montreux
Print_ISBN :
1-4244-0303-0
DOI :
10.1109/ESSCIR.2006.307569
