| 摘要 |
Transducer applies in the field of radio communication and serves to receive radio signals of different frequency ranges. For this purpose an inductive coupling between an antenna and receiver an input circuit is being used. In the proposed transducer, the signal from the antenna is amplified by means of a transistor VT 1 and a separating capacitor C 5 goes to a transistor frequency mixer VT 2 that is loaded by an inductance coil L2. A signal generated by a generator VT 3 through elements L2, C6 is transferred to the emitter of transistor VT 2. Frequency of the signal may be chosen by elements L2, C7. The antenna input terminal connection wire regarding L2 is set in a way to induce the transducer formed signal of the appropriate frequencies. |
