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A 3V 12-55MHz BiCMOS Continuous-Time Filter with Pseudo-Differential Structure

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3 Author(s)
Rezzi, F. ; Dipartimento di Elettronica - Universita'' di Pavia - Via Abbiategrasso, 209 - 27100 Pavia - Italia ; Baschirotto, A. ; Castello, R.

In this paper a 3V 2nd order lowpass continuous-time filter is presented. The filter is based on a highly linear pseudo-differential transconductor. The input common-mode signal is cancelled at the transconductor level using a feed-forward path. The output common-mode voltage is controlled at the filter level using lossy-integrators. A prototype cell has been realized in 1.2¿BiCMOS technology. The pole frequency can be tuned in the range 12-55MHz. A THD of ¿40dB is achieved for signals up to lVpp at 10MHz. The dynamic range is approximately 60dB.

Published in:

Solid-State Circuits Conference, 1995. ESSCIRC '95. Twenty-first European

Date of Conference:

19-21 Sept. 1995