Name
Title | ||
|---|---|---|
A Dual Band Fractional-N Frequency Synthesizer with a Self-Calibrated Charge Pump for WLAN Standards. |
Abstract | ||
|---|---|---|
This work presents a fully integrated fractional-N frequency synthesizer that covers the entire frequency bands specified in the IEEE 802.11 a/b/g/n. In this paper, the effects of charge pump (CP) gain mismatch on spectral purity of local oscillator signal is studied theoretically and a new high precision self-calibrated CP is presented for alleviating the nonidealities. The idea is implemented in a 0.18-mu m standard CMOS technology. According to post layout simulation, the proposed calibration circuit demonstrates an excellent matching in the CP currents in a wide voltage range. By using this technique, the average of close-in phase noise of the designed frequency synthesizer is suppressed by more than 12 dBc. The active whole chip die area is 0.475 mm(2) and the power dissipation from a 1.8-V DC supply is 17.3-20.6 mW. |
Year | DOI | Venue |
|---|---|---|
2018 | 10.1142/S0218126618501311 | JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS |
Keywords | Field | DocType |
802.11,fractional-N,phase locked loop,self-calibrated CP,close-in phase noise,noise folding | Phase-locked loop,Spectral purity,Computer science,Voltage,Phase noise,Frequency synthesizer,Electronic engineering,CMOS,Charge pump,Local oscillator | Journal |
Volume | Issue | ISSN |
27 | 8 | 0218-1266 |
Citations | PageRank | References |
0 | 0.34 | 12 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Mostafa Azadbakht | 1 | 0 | 0.68 |
| Ali Sahafi | 2 | 5 | 2.26 |
| Esmaeil Najafi | 3 | 5 | 4.35 |