Title :
A 0.18 μm CMOS SC lowpass filter for Bluetooth channel selection
Author :
Pereira, Jacqueline S. ; Petraglia, Antonio ; Maloberti, Franco
Author_Institution :
Dept. of Electr. Eng., Rio de Janeiro Fed. Univ., Brazil
Abstract :
The integrated circuit design of a switched-capacitor filter for Bluetooth specifications is described. It was based on the optimum allocation of poles and zeros to generate a transfer function with unequal numerator and denominator orders, so that a direct-form structure with reduced number of opamps and low sensitivity to capacitor rate errors were obtained. It was designed for implementation in the TSMC 0.18 μm CMOS process, using differential OTA structures with a dynamic biasing circuit to reduce power consumption. Layout strategies were carefully considered in order to reduce nonideal effects. With the aid of a computer program, simulations with the extracted parameters were performed to verify the integrated circuit performance.
Keywords :
Bluetooth; CMOS integrated circuits; circuit optimisation; integrated circuit layout; low-pass filters; low-power electronics; poles and zeros; switched capacitor filters; transfer functions; 0.18 micron; Bluetooth channel selection; CMOS lowpass filter; SC lowpass filter; TSMC CMOS process; capacitor rate error sensitivity; circuit layout strategy; computer program-aided simulations; differential OTA structure; dynamic biasing circuit; integrated circuit design; integrated circuit performance; nonideal effects reduction; opamps; optimum poles and zeros allocation; power consumption reduction; switched-capacitor filter; transfer function generation; Bluetooth; CMOS process; Capacitors; Computer errors; Energy consumption; Filters; Integrated circuit synthesis; Poles and zeros; Switching circuits; Transfer functions;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1328223
