Title :
A CMOS fully-balanced continuous-time IFLF filter design for read/write channels
Author :
Chiang, David H. ; Schaumann, Rolf
Author_Institution :
Dept. of Electr. Eng., Portland State Univ., OR, USA
Abstract :
The design and implementation method of a CMOS continuous-time inverse-follow-the-leader feedback (IFLF) filter are described. The approach permits the realization of arbitrary transfer functions. A seventh-order lowpass filter with equiripple delay and real zeros to effect a gain boost is implemented by using a linear, fully-balanced CMOS operational transconductance amplifier (OTA) which has high DC gain and extremely wide bandwidth. SPICE simulations show that the cut-off frequency of the lowpass filter without real zeros and with real zeros ranged from 5 to 20 MHz and 10 to 47 MHz, respectively. Total harmonic distortion (THD) is less than 0.45% for a differential input voltage of Vin=1 Vpp at 1 MHz. Power consumption is 120 mW for a 5-V supply
Keywords :
CMOS analogue integrated circuits; VHF filters; circuit feedback; continuous time filters; hard discs; linear network synthesis; low-pass filters; radiofrequency filters; transfer functions; 120 mW; 5 V; 5 to 47 MHz; CMOS OTA; CMOS continuous-time filter; IFLF filter design; SPICE simulations; THD; active filters; arbitrary transfer functions; equiripple delay; fully-balanced configuration; hard disc drives; inverse-follow-the-leader feedback filter; operational transconductance amplifier; power consumption; read/write channels; real zeros; seventh-order lowpass filter; total harmonic distortion; wide bandwidth opamp; Bandwidth; Cutoff frequency; Delay effects; Design methodology; Feedback; Nonlinear filters; Operational amplifiers; SPICE; Transconductance; Transfer functions;
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
DOI :
10.1109/ISCAS.1996.539835
