STABILITY ANALYSIS OF OSCILLATORS BASED ON A DELTA–SIGMA TOPOLOGY |
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| D. Macii, P. Carbone, D. Petri |
- Abstract:
- The growing demand of mixed–signal integrated circuits encourages the research of Built-In Self-Test (BIST) techniques to achieve simpler and less expensive testing processes. High quality sinusoidal oscillators based on a Δ-Σ topology are an effective solution to perform the test of this kind of devices. Unfortunately, due to the in–loop 1–bit quantizer nonlinearity, several problems of stability have been observed. A stability analysis on the behavior of the oscillator based on a second order Δ-Σ modulator presented in [1] is described in this paper. In particular, it is shown that the oscillator is intrinsically unstable and its complete dynamics is very difficult to predict exactly. Finally, a possible stabilization strategy is proposed.
- Keywords:
- BIST, oscillator, delta–sigma
- Download:
- IMEKO-TC4-2002-047.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 Conference and Workshop 2002
- Title:
- 4th International Conference on Advanced A/D and D/A Conversion Techniques and their Applications (together with 7th IMEKO TC4 Workshop on ADC Modelling and Testing)
- Place:
- Prague, CZECH REPUBLIC
- Time:
- 26 June 2002 - 28 June 2002