Name
Title | ||
|---|---|---|
Design, Analysis, and Implementation of Analog Complex Filter for Low-IF Wireless LAN Application |
Abstract | ||
|---|---|---|
The design and implementation of an analog complex filter for low-IF WLAN 802.11a receiver is described. An IF of 20 MHz is chosen as a trade off between image-rejection and power consumption. The specified bandwidth is 20 MHz. Baseband processing requires low group-delay variation in the received signal to meet bit error rate (BER) specification. This requires a design of high frequency, wide bandwidth and high attenuation filter. To resolve these issues, fifth-order complex transitional Bessel-Chebyshev filter is implemented to compromise between high attenuation and low group-delay variation. Measured results show the designed filter provides 30 dB to 40 dB image rejection and 18 dB adjacent channel rejection, while keeping a low group-delay variation of below 6.0 ns within the pass-band. High frequency and wide bandwidth filter also requires stringent design specification of the circuitries. Differential inverter transconductor is optimized for this continuous-time filter design. The complete filter including on-chip tuning circuit and bandgap consumes only 7.5 mA with 1.8 V single supply voltage. The circuit is fabricated using 0.18 μm, 6-metal-single-poly CMOS process. |
Year | DOI | Venue |
|---|---|---|
2004 | 10.1109/ICVD.2004.1260958 | VLSI Design |
Keywords | Field | DocType |
low group-delayvariation,thiscontinuous-time filter design,stringent design specification,complex filter,keepinga low group-delay variation,high attenuationand low group-delay,wide bandwidth,low-if wireless lan application,complete filter includingon-chip,wide bandwidth filter,high frequency,high attenuation filter,inverter,chebyshev filters,frequency,chip,bandwidth,baseband,butterworth filters,image rejection,attenuation,bessel function,group delay,receptor,cmos integrated circuits,filter design,band pass filters,circuits,tuning,bit error rate,implementation,base band,analog filter,signal processing,operational amplifiers,receiver,chebyshev filter,optimization | Band-stop filter,Active filter,Computer science,High-pass filter,Electronic engineering,Low-pass filter,m-derived filter,Electrical engineering,Voltage-controlled filter,Filter design,Butterworth filter | Conference |
ISBN | Citations | PageRank |
0-7695-2072-3 | 1 | 0.41 |
References | Authors | |
2 | 4 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| T. Hui Teo | 1 | 9 | 3.07 |
| Ee-Sze Khoo | 2 | 1 | 0.41 |
| Dasgupta Uday | 3 | 1 | 0.41 |
| Chin-Boon Tear | 4 | 1 | 0.41 |