A 0.13-&amp;#x03BC;m CMOS &amp;#x03A3;-&amp;#x0394; frequency synthesizer with an area optimizing LPF, fast AFC time, and a wideband VCO for WCDMA/GSM/GPRS/EDGE applications

-This paper presents an integrated wide-range VCO with a modified tuning scheme to deal with VCO frequency drift over temperature. In this approach, during the coarse-tune operation, VCO tune voltage is a function of temperature such that it resembles the inverse function of VCO fine-tune characteristic. Without degrading VCO performance, the proposed temperature adaptive tuning optimizes the maximum tolerable VCO temperature frequency drift over which PLL remains locked. As a result, VCO gain can be reduced significantly, making VCO less sensitive to PLL tune voltage noise. Integrated in a multistandard multi-band transceiver with a small VCO gain of 50MHz/V at 3.90GHz, PLL remains locked despite 45MHz frequency drift of VCO over [-30ºC, 85ºC]. Using an on-chip inductor, VCO covers from 3.15GHz to 4.60GHz, achieving -138.0dBc/Hz phase noise at 3.0MHz at 3.90GHz by drawing just 8.5mA from 1.60V supply in 0.13u CMOS process.Index Terms -Wide-range VCO, VCO temperature frequency drift, VCO fine-tune , on-chip inductor, PLL

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A 0.13-μm CMOS Σ-Δ frequency synthesizer with an area optimizing LPF, fast AFC time, and a wideband VCO for WCDMA/GSM/GPRS/EDGE applications

Cited by 4 publications

References 4 publications

A Novel Frequency Tuning and Calibration Scheme in an E-band PLL

A Novel Frequency Tuning and Calibration Scheme in an E-band PLL

A 0.13-µm CMOS multi-band WCDMA/HSDPA receiver adopting silicon area reducing techniques

A wide-range VCO with optimum temperature adaptive tuning

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A 0.13-&#x03BC;m CMOS &#x03A3;-&#x0394; frequency synthesizer with an area optimizing LPF, fast AFC time, and a wideband VCO for WCDMA/GSM/GPRS/EDGE applications

Cited by 4 publications

References 4 publications

A Novel Frequency Tuning and Calibration Scheme in an E-band PLL

A Novel Frequency Tuning and Calibration Scheme in an E-band PLL

A 0.13-&#x00B5;m CMOS multi-band WCDMA/HSDPA receiver adopting silicon area reducing techniques

A wide-range VCO with optimum temperature adaptive tuning

Contact Info

Product

Resources

About

A 0.13-μm CMOS Σ-Δ frequency synthesizer with an area optimizing LPF, fast AFC time, and a wideband VCO for WCDMA/GSM/GPRS/EDGE applications

A 0.13-µm CMOS multi-band WCDMA/HSDPA receiver adopting silicon area reducing techniques