Caller-identification receiving apparatus

• US 6,243,461 B1
• Filed: 06/02/1998
• Issued: 06/05/2001
• Est. Priority Date: 04/21/1998
• Status: Expired due to Fees

• Current Assignee: Winbond Electronics Corporation
• Original Assignee: Winbond Electronics Corporation
• Inventors: Hwang, Bar-Chung
• Primary Examiner(s): Le, Huyen
• Assistant Examiner(s): Eng, George
• Application Number:
  US09/089,331
• Time in Patent Office: 1,099 Days
• Field of Search: 379/88.19, 379/88.21, 379/93.17, 379/93.23, 379/127, 379/142, 379/179, 379/258, 379/372-373, 379/376, 379/382, 379/386, 379/354, 455/13.4, 455/38.3, 455/342, 455/522, 455/574
• US Class Current: 379/372
• CPC Class Codes: H04M 1/573 Line monitoring circuits for detecting caller identification

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.

Claims

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.

2. The receiving apparatus of claim 1, wherein the receiving apparatus further comprises a ring detector being coupled to the telephone wire for outputting a control signal to activate the wake-up circuit when the ring appears on the telephone wire.

3. The receiving apparatus of claim 1, wherein the receiving apparatus further comprises a lower-frequency clock to provide a clock for the timer.

4. The receiving apparatus of claim 3, wherein the receiving apparatus further comprises a frequency multiplier to transform the lower-frequency clock into a higher-frequency clock to provide a clock for the FSK detector and demodulator.

5. The receiving apparatus of claim 1, wherein the data-recovery circuit is to process a data message of the caller-ID, the signal of the channel seizure and a signal of a mark.

6. A caller-identification (caller-ID) receiving apparatus, comprising:

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.

7. The receiving apparatus of claim 6, wherein the receiving apparatus further preferable comprises a lower-frequency clock to provide a clock for the timer.

8. The receiving apparatus of claim 7, wherein the receiving apparatus further comprises a frequency multiplier to transform the lower-frequency clock into a higher-frequency clock to provide a clock for the FSK detector and demodulator.

9. The receiving apparatus of claim 6, wherein the data-recovery circuit is to process a data message of the caller-ID, the signal of the channel seizure and a signal of a mark.