Programmable sinusoidal oscillator circuit

摘要

A programmable sinusoidal oscillator circuit is a sinusoidal oscillator circuit that includes a current-feedback operational-amplifier (CFOA) operably connected to two operational transconductance amplifiers (OTAs), two capacitors and a resistor. The programmable sinusoidal oscillator circuit enjoys electronic orthogonal tuning of the frequency and the condition of oscillation by adjusting the biasing currents (voltages) of the OTAs, as well as providing a low output impedance.

主权项

1. A programmable sinusoidal oscillator circuit, comprising:
a current feedback operational amplifier (CFOA) having an x inverting input and a y non-inverting input, a z output terminal and a w output terminal; an end terminal of a first current divider connected to the x input, the first current divider including an admittance Y5 and an input coupling admittance Y4; a split terminal of a second current divider connected to the y input, the second current divider including admittances Y1 and Y2; and a coupling admittance element Y3 being connected in a feedback configuration to a split terminal of the first current divider and an end terminal of the second current divider, the end terminal of the second current divider being connected to the z output terminal of the CFOA, wherein at least one admittance element of the programmable sinusoidal oscillator circuit is an active transconductance element, at least one admittance element of the programmable sinusoidal oscillator circuit is a passive element, the passive elements in the programmable sinusoidal oscillator circuit are passive capacitive elements, and oscillations generated by the programmable sinusoidal oscillator circuit appear at the w output terminal, the w output terminal having a low output impedance.