Amplifiers Patents (Class 330)
- Including Class D amplifier (Class 330/251)
- Including differential amplifier (Class 330/252)
- Including push-pull amplifier (Class 330/262)
- Including field effect transistor (Class 330/277)
- Including gain control means (Class 330/278)
- Including distributed parameter-type coupling (Class 330/286)
- Including current mirror amplifier (Class 330/288)
- Including temperature compensation means (Class 330/289)
- Including D.C. feedback bias control for stabilization (Class 330/290)
- Including signal feedback means (Class 330/291)
- Including plural amplifier channels (Class 330/295)
- Including particular biasing arrangement (Class 330/296)
- Including particular power supply circuitry (Class 330/297)
- Including protection means (Class 330/298)
- Including combined diverse-type semiconductor device (Class 330/299)
- Including balanced to unbalanced circuits and vice versa (Class 330/301)
- Including frequency-responsive means in the signal transmission path (Class 330/302)
- Integrated circuits (Class 330/307)
- Including atomic particle or radiant energy impinging on a semiconductor (Class 330/308)
- Involving structure of three diverse function electrode type (Class 330/309)
- Including plural stages cascaded (Class 330/310)
- Compensating for inter-electrode impedance (e.g., neutralization) (Class 330/76)
- At least one push-pull signal stage (Class 330/81)
- Plural amplifier channels (Class 330/84)
- Amplifier in signal feedback path (Class 330/85)
- Variable impedance in feedback path varied by separate control path (Class 330/86)
- Cathode impedance feedback (Class 330/87)
- Combined with control of bias voltage of signal amplifier (Class 330/96)
- Including D.C. path for signal feedback (Class 330/97)
- In cascade amplifiers (Class 330/98)
- Positive and negative feedback in same path at different frequencies (Class 330/101)
- Current and voltage feedback (Class 330/102)
- Multiple feedback paths (Class 330/103)
- From impedance in series with output load (e.g., current feedback) (Class 330/105)
- In series with input source (Class 330/106)
- Phase shift means in loop path (Class 330/107)
- Potentiometer common to signal and feedback path (Class 330/108)
- Frequency responsive feedback means (Class 330/109)
- Nonlinear impedance element in loop path (Class 330/110)
- To or from an auxiliary grid or to the anode (Class 330/111)
- Positive feedback (Class 330/112)
- Coupling to cathode (Class 330/158)
- Coupling to plate or auxiliary grid (Class 330/160)
- Output coupling from grid (Class 330/162)
- With electronic tube or diode in coupling circuit (Class 330/164)
- Transformer coupling (Class 330/165)
- Coupling from cathode (Class 330/172)
- With electromechanical transducer (e.g., piezoelectric crystal) (Class 330/174)
- With lattice or Wheatstone bridge network in coupling circuits (Class 330/175)
- With T, H, or Pi network in coupling circuit (Class 330/176)
- With coupling or blocking capacitor (Class 330/177)
- D.C. coupled (Class 330/181)
