Caller-identification receiving apparatus
First Claim
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1. A caller-identification (caller-ID) receiving apparatus used in a telephone, coupled to a telephone wire to automatically detect a signal of a channel seizure and process a message-waiting, comprising:
- a wake-up circuit, wherein the wake-up circuit is coupled to the telephone wire and can be activated when a ring appears on the telephone wire;
a timer, wherein the timer is able to periodically send a signal to activate the wake-up circuit;
a frequency shift keying (FSK) detector and demodulator, wherein the FSK detector and demodulator is coupled to the telephone wire and can be activated by the wake-up circuit to detect an FSK signal on the telephone wire and demodulate the FSK signal and, therefore, export a demodulated signal; and
a data-recovery circuit, wherein the data-recovery circuit can receive the demodulated signal, wherein when the wake-up circuit has been activated by the timer to wake up the FSK detector and the data-recovery circuit, but the signal of the channel seizure has not been detected yet after a certain time, then the data-recovery circuit sends a sleeping signal to the wake-up circuit to put the FSK detector and demodulator in a sleeping state.
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Abstract
A caller-identification receiving apparatus can process the data message of a caller-identification without a micro-controller by utilizing a ring signal to activate circuits in a sleeping state while the telephone is on-hook. Moreover, the device has a timer to automatically activate the circuits in the sleeping state to detect the signal of a channel seizure and process the message-waiting.
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Citations
9 Claims
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1. A caller-identification (caller-ID) receiving apparatus used in a telephone, coupled to a telephone wire to automatically detect a signal of a channel seizure and process a message-waiting, comprising:
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a wake-up circuit, wherein the wake-up circuit is coupled to the telephone wire and can be activated when a ring appears on the telephone wire;
a timer, wherein the timer is able to periodically send a signal to activate the wake-up circuit;
a frequency shift keying (FSK) detector and demodulator, wherein the FSK detector and demodulator is coupled to the telephone wire and can be activated by the wake-up circuit to detect an FSK signal on the telephone wire and demodulate the FSK signal and, therefore, export a demodulated signal; and
a data-recovery circuit, wherein the data-recovery circuit can receive the demodulated signal, wherein when the wake-up circuit has been activated by the timer to wake up the FSK detector and the data-recovery circuit, but the signal of the channel seizure has not been detected yet after a certain time, then the data-recovery circuit sends a sleeping signal to the wake-up circuit to put the FSK detector and demodulator in a sleeping state. - View Dependent Claims (2, 3, 4, 5)
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6. A caller-identification (caller-ID) receiving apparatus, comprising:
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a ring detector, wherein the ring detector is coupled to the telephone wire to activate a wake-up circuit when a ring appears on the telephone wire;
a timer, wherein the timer is able to periodically send a signal to activate the wake-up circuit;
a frequency shift keying (FSK) detector and demodulator, wherein the FSK detector and demodulator is coupled to the telephone wire and can be activated by the wake-up circuit to detect an FSK signal on the telephone wire and demodulate the FSK signal and, therefore, export a demodulated signal; and
a data-recovery circuit, wherein the data-recovery circuit can receive the demodulated signal, wherein when the wake-up circuit has been activated by the timer to wake up the FSK detector and the data-recovery circuit, but a signal of a channel seizure has not been detected after a certain time, then the data-recovery circuit sends a sleeping signal to the wake-up circuit to put the FSK detector and demodulator in a sleeping state. - View Dependent Claims (7, 8, 9)
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Specification