Low power indicating circuit for a radio transmitter
First Claim
Patent Images
1. A low power indicating circuit for a radio transmitter comprising:
- a. an output power magnitude detector for coupling to the output of said radio transmitter and producing a power magnitude signal related thereto;
b. first means for providing a selectable power magnitude reference signal;
c. second means coupled to said output power magnitude detector and to said first means for producing a feedback signal for application to said radio transmitter to control said output power magnitude as a function of the selected power magnitude provided by said first means;
d. a low power magnitude circuit coupled to said first means for selecting a low power magnitude signal therefrom;
e. third means coupled to said output power magnitude detector and to said low power magnitude circuit for producing a low power signal in response to said power magnitude signal being less than said low power magnitude signal;
f. and means coupled between said third means and said radio transmitter for shutting off said radio transmitter in response to said low power signal.
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Abstract
Low power for a radio transmitter is indicated by an output power detector voltage falling below a low power reference voltage derived from an existing power control circuit.
31 Citations
5 Claims
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1. A low power indicating circuit for a radio transmitter comprising:
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a. an output power magnitude detector for coupling to the output of said radio transmitter and producing a power magnitude signal related thereto; b. first means for providing a selectable power magnitude reference signal; c. second means coupled to said output power magnitude detector and to said first means for producing a feedback signal for application to said radio transmitter to control said output power magnitude as a function of the selected power magnitude provided by said first means; d. a low power magnitude circuit coupled to said first means for selecting a low power magnitude signal therefrom; e. third means coupled to said output power magnitude detector and to said low power magnitude circuit for producing a low power signal in response to said power magnitude signal being less than said low power magnitude signal; f. and means coupled between said third means and said radio transmitter for shutting off said radio transmitter in response to said low power signal.
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2. A low power indicating circuit for a radio transmitter comprising:
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a. an output power magnitude detector for coupling to the output of said radio transmitter and producing a power magnitude signal related thereto; b. first means for providing a selectable power magnitude reference signal; c. second means coupled to said output power magnitude detector and to said first means for producing a feedback signal for application to said radio transmitter to control said output power magnitude as a function of the selected power magnitude provided by said first means; d. a low power magnitude circuit coupled to said first means for selecting a low power magnitude signal therefrom; e. third means coupled to said output power magnitude detector and to said low power magnitude circuit for producing a low power signal in response to said power magnitude signal being less than said low power magnitude signal; f. and means coupled to said third means for providing an alarm in response to said low power signal. - View Dependent Claims (3, 4, 5)
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Specification