Transmitter

Abstract

Abstract PURPOSE:To realize a desired system by a simple circuit, by switching and transmitting automatically and alternately a digital data and voice information by the same transmitter. CONSTITUTION:By turning on a start switch 8, a cassette deck 1 is set to a stand-by state through an input/output port 6-4. Subsequently, a data sent out of a communication control LSI 6-1 is converted by an MSK modulating part 2-1, converted to, for instance, an FM modulated wave by a modulator 2-3 through a changeover switch 2-2, and transmitted through an antenna 2-4. When the final data is transmitted, the cassette deck 1 is released from the stand-by, a voice is transmitted, the control signal of the end of voice information is detected by a control signal detecting circuit 3, compared with a threshold value by a comparator 4, inverted by an inverter 5 and the input/output port is controlled.

Inventors

• 👤 Shinji Fukuda
• 👤 晋児 福田

Bibliographic Details