US PATENT SUBCLASS 331 / 141
.~.~ Wien bridge

Current as of: June, 1999
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331 /   HD   OSCILLATORS

138  DF  BRIDGE TYPE {2}
140  DF  .~ R.C. or R.L. type {2}
141.~.~ Wien bridge

DEFINITION

Classification: 331/141

(under subclass 140) Oscillators wherein the feedback network lattice comprises two pure resistance arms and two impedance arms, one impedance arm including a series-connected capacitor and resistor and the other impedance arm including a parallel-connected capacitor and resistor, positive feedback being obtained through the impedance arms and negative feedback through the pure resistance arms. These oscillators are generally known as Wien bridge type.