Direct digital-frequency synthesis by analog interpolation

被引：22

作者：

McEwan, Alistair ^{[1
]}

Collins, Steve ^{[1
]}

机构：

[1] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2006年 / 53卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

ROM-less direct digital-frequency synthesis (DDFS) instrumentation;

D O I：

10.1109/TCSII.2006.882349

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A highly compact 9-bit CMOS direct digital synthesizer without read-only memory that consumes 8 mu W/MHz is described. The circuit is based upon a small nonlinear array of six current sources and six current switches. This array converts an analog voltage that represents the signal phase to an output current that represents the corresponding amplitude. Measurement results show that the resulting 3.3-V 0.35-mu m system is robust to mismatch and capable of generating a signal with a spurious free dynamic range as good as -48 dBc with a circuit area of 0.0085 mm(2). This level of performance and the compactness of the analog circuit make it an attractive starting point for the arrays of frequency synthesizers that will be needed in a range of instrumentation systems.

引用

页码：1294 / 1298

页数：5

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