Design of robust pseudo-resistors with optimized frequency response
| Autor: | Guido Torelli, Jose L. Ausin, Francisco Duque-Carrillo, D. Palomeque-Mangut |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Frequency response
Total harmonic distortion Materials science 020208 electrical & electronic engineering Time constant Linearity Biasing 02 engineering and technology 020202 computer hardware & architecture law.invention law Control theory 0202 electrical engineering electronic engineering information engineering Resistor Electronic circuit Voltage |
| Zdroj: | ECCTD |
| DOI: | 10.1109/ecctd.2017.8093269 |
| Popis: | In this paper, the implementation of very large time constant circuits by means of MOS-bipolar pseudo-resistors (PR's) is addressed. Three main aspects regarding the design of a PR are discussed: (i) operating voltage range and linearity, (ii) precision and robustness against process, voltage, and temperature (PVT) variations and (iii) frequency response degradation. A bias voltage source for precisely tuning PR's and reducing its sensitivity to PVT variations while maintaining good operating voltage range and frequency response is proposed. Monte Carlo simulations using a standard 0.35 μm CMOS process in Cadence show that the proposed bias voltage source reduces the σ/μ ratio of PR's from 1.5 to 0.4. With the bias circuit and the design approach proposed, PR's with an equivalent resistance up to dozens GΩ and THD below 3% can be obtained for signal amplitudes below 150 mV and frequencies from DC up to 8 kHz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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