Name
Title | ||
|---|---|---|
A Fast F(C) Automatic Tuning Circuit With Wide Tuning Range For Wcdma Direct Conversion Receiver Systems |
Abstract | ||
|---|---|---|
A fast f(c) automatic tuning circuit suitable for WCDMA systems is proposed. The circuit employs master-slave architecture using digitally controlled G(m)-C filter for avoiding long transient response. The tuning feedback loop contains a 2-bit up-down counter ADC for fast tuning operation. Furthermore, to avoid degradation of f(c) tuning accuracy due to reference feedthrough, an analog loop filter with notch located near reference frequency is used. The fast f(c) automatic tuning circuit is fabricated in a SiGe BiCMOS process. The tuning time within 200 mu s is achieved for 35 chips from 2 lots and the standard deviation of 25.5 kHz is obtained for the average f(c) of 2.12 MHz. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1093/ietele/e90-c.6.1247 | IEICE TRANSACTIONS ON ELECTRONICS |
Keywords | DocType | Volume |
wCDMA, DCR, lowpassfilter, f(c), automatic tuning | Journal | E90C |
Issue | ISSN | Citations |
6 | 1745-1353 | 0 |
PageRank | References | Authors |
0.34 | 0 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Osamu Watanabe | 1 | 0 | 0.34 |
| Rui Ito | 2 | 0 | 0.34 |
| Shigehito Saigusa | 3 | 0 | 0.34 |
| Tadashi Arai | 4 | 0 | 1.69 |
| Tetsuro Itakura | 5 | 187 | 33.44 |