| 330 / | HD | AMPLIFIERS |
|
| 250 | DF | WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) {21} |
| 262 |  | .~ Including push-pull amplifier {8} |
| 263 | DF | .~.~> Having complementary symmetry {4} |
| 269 | DF | .~.~> Having field effect transistor |
| 270 | DF | .~.~> Having D.C. feedback bias control for stabilization |
| 271 | DF | .~.~> Having signal feedback means |
| 272 | DF | .~.~> Having temperature compensating means |
| 273 | DF | .~.~> Having particular biasing arrangement {1} |
| 275 | DF | .~.~> Having balanced to unbalanced circuitry and vice versa |
| 276 | DF | .~.~> Having transformer |