| Autor: |
Becker-Gómez, Adriana, Çilingiroğlu, Uğur, Silva-Martínez, J. |
| Předmět: |
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| Zdroj: |
IEEE Journal of Solid-State Circuits; Jun2003, Vol. 38 Issue 6, p929-934, 6p, 3 Diagrams, 1 Chart, 9 Graphs |
| Abstrakt: |
Single-ended and differential operational transconductance amplifier (OTA) configurations are biased with MOSFET interface-trap charge-pumping (ITCP) current generators to achieve very low transconductances for tunable sub-hertz operational transconductance amplifier-capacitor (OTA-C) filter implementation. This paper reviews the basics of ITCP current generation and presents the transconductors and the OTA-C filter configurations based on these transconductors. One of the filters is a low-pass with an experimentally determined lowest cutoff frequency of 0.18 Hz, and the other is a fully differential bandpass with individually tunable lower and upper cutoff frequencies measured down to 0.3 Hz. The former has one 15-pF filter capacitor, and measures 0.0346 mm2, whereas the latter contains four such capacitors and occupies 0.188 mm2 silicon. Experimental evaluation also includes offset, harmonic distortion, and noise performance. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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