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Definition of "twin-T bridge" |
represents a parallel connection of two T-shape two-ports. Each such two-port includes three impedances: two impedances are connected in series between input and output of the two-port, and the third impedance is connected between ground and the common point of two series impedances. The most important in applications is a twin-T bridge where one two-port is a series connection of two resistors and a capacitor is connected between their common point and ground; the other two-port is a series connection of two capacitors and a resistor is connected between their common point and ground. This circuit is used as a passive rejection filter, and as a feedback circuit of some active filters and oscillators. |
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