New Minimum‐Component OTA‐Based Sinusoidal Oscillators

Abstract

Using a general oscillator structure, new oscillator circuits are systematically derived. These oscillator circuits use two operational transconductance amplifiers (OTAs) and one externally connected passive element, exploiting the inherent zeros of the OTAs to advantage. The feasibility of obtaining oscillation using only two OTAs without externally connected passive elements is investigated. Experimental results are included.

New OTA-Based Sinusoidal Oscillators with Fully Uncoupled Control of Oscillation Frequency and Condition

“…and Fig. and the condition of oscillation will be the same as in (10). 3(d) with g m i = #",3 = 1 mA/V, gm2 = 1-05 mA/V, Ci = 3 nF.…”

“…A literature survey reveals that a large number of sinusoidal oscillator circuits using single-output OTAs are available; see references [1][2][3][4][5][6][7][8][9][10][11][12][13][14] and the references cited therein. Careful inspection of the available OTA-based sinusoidal oscillator circuits reveals that while many circuits enjoy independent single-element control of the frequency and the condition of oscillation, only very few have the attractive feature of totally uncoupled frequency and condition of oscillation.…”