Name
Title | ||
|---|---|---|
High-Frequency Low-Noise Voltage-Controlled Lc-Tank Oscillators Using A Tunable Inductor Technique |
Abstract | ||
|---|---|---|
This paper describes 3-GHz and 7-GHz tunable-inductance LC-tank voltage-controlled oscillators (VCOs) implemented in 0.18-mu m CMOS technology. Unlike the traditional tuning method by a varactor, a tunable inductor is employed in the VCO by using a transformer to compensate for the energy loss. The VCO facilitates the tuning frequency and low noise of the output signals, together with a variable inductor which satisfies both criteria. The 3-GHz VCO using a symmetry transformer provides the tuning range of 2.85 to 3.12 GHz at 1-V supply. The power consumption is 4.8 mW while the measured phase noise is -126 dBc/Hz at 1-MHz offset from a 2.85-GHz carrier. A small-area stacked transformer is employed in the 7-GHz VCO, which achieves a tuning range of 6.59 to 7.02 GHz and measured phase noise of -114 dBc/Hz at 1-MHz offset from a 6.59-GHz carrier while consuming 9 mW from a 1.2-V supply. |
Year | DOI | Venue |
|---|---|---|
2006 | 10.1093/ietele/e89-c.11.1567 | IEICE TRANSACTIONS ON ELECTRONICS |
Keywords | Field | DocType |
LC VCO, tunable inductor, high Q, transformer | LC circuit,Transformer,Phase noise,Inductor,Electronic engineering,Voltage-controlled oscillator,Engineering,dBc,Electrical engineering,Varicap,Amplifier | Journal |
Volume | Issue | ISSN |
E89C | 11 | 1745-1353 |
Citations | PageRank | References |
1 | 0.37 | 11 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Ching-Yuan Yang | 1 | 227 | 36.15 |
| Meng-Ting Tsai | 2 | 25 | 2.61 |