Transmitting apparatus
First Claim
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1. A transmitting apparatus, comprising:
- a transmission circuit receiving an intermediate frequency signal superposed on a DC voltage, converting the intermediate frequency signal to a microwave signal and outputting;
a power supply circuit receiving said DC voltage as an input and supplying power to said transmission circuit;
an input voltage detecting circuit detecting said input DC voltage;
a switch circuit turning on/off the power supplied from said power supply circuit to said transmission circuit; and
a control circuit controlling said switch circuit to be turned off based on a detection output from said input voltage detecting circuit when said DC voltage has such a value that the power supplied from said power supply circuit to said transmission circuit causes abnormal operation of said transmission circuit.
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Abstract
A DC voltage input through an input terminal is applied through an inductor, to a power supply circuit unit and an input voltage detecting circuit. The input voltage detecting circuit detects the input DC voltage and when it is detected that the input voltage value may possibly cause malfunction, a control circuit turns off a switch circuit based on the detection output, whereby power supply from the power supply circuit to a transmission circuit is stopped, and malfunction of the transmission circuit is prevented.
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Citations
6 Claims
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1. A transmitting apparatus, comprising:
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a transmission circuit receiving an intermediate frequency signal superposed on a DC voltage, converting the intermediate frequency signal to a microwave signal and outputting; a power supply circuit receiving said DC voltage as an input and supplying power to said transmission circuit; an input voltage detecting circuit detecting said input DC voltage; a switch circuit turning on/off the power supplied from said power supply circuit to said transmission circuit; and a control circuit controlling said switch circuit to be turned off based on a detection output from said input voltage detecting circuit when said DC voltage has such a value that the power supplied from said power supply circuit to said transmission circuit causes abnormal operation of said transmission circuit. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification