Alarm circuit for residual capacity of battery in portable radio transmitting and receiving apparatus
First Claim
1. An alarm circuit for the residual capacity of a battery in a portable radio transmitting and receiving apparatus, comprising:
- a memory for storing an alarm voltage of said battery, and a sound alarm generated through either a speaker or a receiver;
means for detecting a voltage of said battery to generate a detected voltage;
means for comparing said detected voltage with said alarm voltage to generate an alarm signal, when said detected voltage is lower than said alarm voltage to drive said speaker when said apparatus is in a waiting state and to drive said receiver when said apparatus is in a speaking state; and
means for controlling one of said speaker and receiver to be driven in accordance with said sound alarm selected when said alarm signal is generated.
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Accused Products
Abstract
Voltage setting information designating a battery voltage for initiating alarming and alarm setting information designating a method for outputting the alarm are input from a keying section and variably stored in a memory. A computing section compares battery voltage information in a battery detected by a battery voltage detecting section with the voltage setting information and, when the voltage in the battery voltage information is lower than the voltage in the voltage setting information, outputs an alarm sound signal or a call incoming lamp signal based on the alarm setting information to give the alarm to a user by sounding the alarm using a sound source or by emitting light using a call incoming lamp. This construction enables the residual capacity of the battery, at which alarming is initiated, and a method for giving the alarm to be varied as desired by a user.
24 Citations
10 Claims
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1. An alarm circuit for the residual capacity of a battery in a portable radio transmitting and receiving apparatus, comprising:
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a memory for storing an alarm voltage of said battery, and a sound alarm generated through either a speaker or a receiver; means for detecting a voltage of said battery to generate a detected voltage; means for comparing said detected voltage with said alarm voltage to generate an alarm signal, when said detected voltage is lower than said alarm voltage to drive said speaker when said apparatus is in a waiting state and to drive said receiver when said apparatus is in a speaking state; and means for controlling one of said speaker and receiver to be driven in accordance with said sound alarm selected when said alarm signal is generated. - View Dependent Claims (2, 9, 10)
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3. An alarm circuit, for the residual capacity in a portable radio transmitting and receiving apparatus, which monitors the output voltage of a battery used as a power source of the portable radio transmitting and receiving apparatus and, upon detection of a signal informing that the voltage approaches the lowest usable voltage of the portable radio transmitting and receiving apparatus, gives a sound alarm generated through either a speaker or a receiver to a user,
wherein the alarm circuit comprises means, which registers voltage setting information for designating a battery voltage for initiating the alarming and registers alarm setting information for designating a method for outputting the alarm through said speaker when said apparatus is in a waiting state and through said receiver when said apparatus is in a speaking state, and, based on the user'"'"'s designation, can set, as desired, a margin time, defined as the time taken from the initiation of the alarming to the point of time when the portable radio transmitting and receiving apparatus becomes actually unusable.
Specification