| 摘要 |
The present invention relates to a device providing for the alternative transmission and reception of information. The device includes a transistor Tc operating in super-feedback mode by virtue of an oscillating circuit Rd mounted between two of its electrodes and of a low-frequency chopping signal Fd. During the time intervals for which this transistor exhibits a high gain, the signals E1 or E2 to be transmitted by an antenna A modulate the signal produced in this transistor; during the remainder of the time the signals received, originating from the antenna A, are demodulated in this transistor Tc and then filtered P1 or P2. Application to the links between a camera and its operating centre. <IMAGE>
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