KR0143567B1 - Room monitoring circuit for a wireless telephone - Google Patents

Abstract

The present invention relates to a room monitor circuit of a radiotelephone capable of automatically setting and monitoring signals around a fixed device in a room monitor mode. The conventional radiotelephone system has a convenient function as a radiotele since it is configured for the purpose of telephone use. It was very difficult to pursue the system, and the intercom function was additionally conceived, so that the call between the fixed device and the portable device was possible, but it was very inconvenient to act as a room monitor. Since the noise around the portable device was transmitted to the fixed device because it had to be operated all the time, it was unsuitable for the room monitor circuit. When attempting to use it as an infant monitoring function, the intercom call ring signal would ring at the fixed device. There is a ham.

The present invention provides only a room monitor circuit that operates only a transmitter of a stationary device to transmit a signal around the stationary device, and a portable device operates only a receiver to monitor a signal around the stationary device.

Description

Room monitor circuit of cordless phone

1 is a block diagram of a fixing device of a conventional radiotelephone.

2 is a block diagram of a fixing device of the radiotelephone of the present invention.

3 is a block diagram of a portable device of the wireless telephone of the present invention.

Figure 4 (a), (b) is a flow chart of the fixed window and the portable device for the present invention,

(a) is a flowchart of the central processing unit for the fixing unit,

(b) is a flowchart of a central processing unit for a portable device.

* Explanation of symbols for main parts of the drawings

80: signal detector 90: signal generator

100: central processing unit (CPU) 110: signal comparison unit

120: signal amplification unit 130: keyboard unit

The present invention compares the signal forces in the place where the fixed device is located by using a mobile device in an automatic answering cordless telephone or a cordless telephone, and automatically sets the room monitor mode to monitor the signal when the magnitude of the signal exceeds a certain force. It relates to a room monitor circuit.

As shown in FIG. 1, the conventional radiotelephone fixing device includes a transmission voice amplifier 70 for amplifying a voice signal introduced through a microphone, and a modulator 60 for modulating the amplified voice signal at a high frequency carrier frequency. ), A high frequency amplification unit 50 for amplifying the modulated frequency again at high frequency, and amplified high frequency radiating the amplified high frequency to the antenna terminal through the buffer unit 10, and buffering the received signal received through the antenna terminal. A high frequency amplifying unit 20 for amplifying the high frequency through the unit 10, a demodulation unit 30 for demodulating the amplified high frequency, and a voice amplifying unit 40 for amplifying the demodulated voice frequency and transmitting the same to a telephone line or a speaker. Consists of

However, since the conventional wireless telephone system was designed for the purpose of using a telephone, it was very difficult to pursue a convenient function as a wireless telephone. Also, the intercom function was additionally envisioned, so that a call between a fixed device and a portable device was possible. It was very inconvenient to act as a room monitor.

In addition, since the intercom circuit had to operate both the transmitting and receiving circuits, the noise around the portable device was transmitted to the fixed device, which was not suitable for the room monitor circuit. When attempting to use it as a baby monitoring function, the intercom call ring signal sounds at the fixed device. There is a discomfort that infants may wake up.

The present invention provides a room monitor circuit that can be set to monitor the room monitor mode automatically when the magnitude of the signal is greater than a certain force by comparing the signal force size of the place where the fixing device is located by using the fixing device and the portable device Has its purpose.

That is, the present invention operates only the transmitter of the stationary device to transmit a signal around the stationary device, and the portable device can monitor the signal around the stationary device by operating only the receiver.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of the fixing device of the radiotelephone, as shown in the figure, a conventional buffer unit 10, a high frequency amplifier 20, a demodulator 30, a voice amplifier 40, and a transmission. In the well-known thing formed by connecting the high frequency amplifier 50, the modulator 60, the voice amplifier 70, a microphone, an antenna, a speaker, and a hybrid (HB), the demodulator 30 and the modulator ( 60) and a signal detector 80 for determining whether a code has been previously agreed between the microphone, a signal generator 90 for generating a voice signal modulated by the modulator, and a microphone when the room monitor setting code is determined. If the signal is amplified by the central processing unit 100 for detecting the surrounding signal, the signal amplification unit 120 for amplifying the ambient signal through the microphone, and the signal amplified by the signal amplification unit is greater than the preset reference level, If the reference level is less than each of the signal comparison unit 110 to determine the noise 3 is a block diagram of the portable device of the wireless telephone, and the keyboard unit 130 is connected to the central processing unit 100.

The operational effects of the present invention configured as described above will be described in detail with reference to the flowcharts of FIGS. 2 and 3 and 4 as follows.

When the user needs to use the room monitor function, the housewife sleeps at the place where the fixing device is located and has another job, so that she is holding the portable device away from the holding device and for other purposes. When the user presses the room monitor button by using the keyboard unit 13 of the mobile device when the user wants to hear a beep, the room monitor setting code set in the room monitor mode is set by the modulator 60 through the signal generator 120. After modulating the high frequency forces and the code, the amplification is sufficiently amplified by the transmitting high frequency amplification unit 50 and then dissipated to the fixed device through the buffer unit 10 and the antenna ANT.

Then, the fixed device amplifies the signal received from the portable device at a high frequency in the high frequency amplifying unit 20, and then determines whether the code is pre-committed by the signal detecting unit 80 through the demodulator 30 to determine the room monitor setting code. In step 101, the central processing unit 100 operates a microphone (step 102) to detect a signal around it (step 103). The ambient signal through the microphone is amplified by the signal amplification unit 120 and then determined by the signal comparator 110 when the signal amplified is greater than the preset left reference level, and is determined by the signal as smaller than the reference level.

If it is determined to be noise (step 105), the surrounding signal is continuously monitored until the monitor mode is released (step 104), and if it is judged to be the signal level (step 105) and detected for 5 seconds or more (step 106), the monitor code is sent to the portable device. (Step 107)

Then, the portable device receives the monitor code and the received code separates the high frequency signal and the voice and other signals from the demodulator 30 through the high frequency amplification unit 20 and then determines the room monitor setting code by the signal detector 80. (Step 108), the monitoring cycle is set in advance (step 110) until the monitor operation is set (step 111) and the monitor release code is fixed if the user does not set the monitor operation within 20 seconds (step 112). After exporting to the device, it goes to standby.

If the user sets the monitor operation (step 111), i.e., presses the monitor button, it transmits the monitor start code and then operates the receiver until the user sets the operation stop (step 113). I keep hearing you.

The fixed device then checks if the monitor start code is entered (step 108) within 30 seconds after sending the monitor confirmation code to the mobile device (step 108). If the monitor start code is not received, the monitor switches to the standby state. If is input, the transmitter is operated to transmit the monitor signal (step 114).

Then, the signal around the fixed device applied from the microphone is amplified by the signal amplifier 120, modulated at high frequency through the modulator 60, and then amplified by the transmit high frequency amplifier 50, and then the buffer unit 10 And through the antenna to the portable device.

As described above, since the transmitter of the mobile device does not operate during the monitor operation, the noise generated by the monitor operation does not occur in the fixed device, so that the room monitor can be performed without waking the infant if it is used for the purpose of monitoring the infant. In addition, when the monitor mode is set, the signal around the fixed device is detected and the portable device can monitor automatically only when a certain amount of force is input.

Claims (1)

The normal buffer unit 10, the high frequency amplifying unit 20, the demodulation unit 30, the audio amplifier 40, the transmission high frequency amplifier 50, the modulator 60, the voice amplifier 70, A signal detecting means (80) for determining whether the code is a predetermined contract between the demodulator (30), the modulator (60), and the microphone in a known one connected by a microphone, an antenna, a speaker, and a hybrid (HB). And, a signal generating means (90) for generating a voice signal modulated by the modulator, a central processing unit (100) for operating the microphone to detect surrounding signals if determined by the room monitor setting code, and an ambient signal through the microphone. The signal amplification means 120 for amplifying the signal and the signal amplification unit is a fixed signal consisting of a signal comparing means 110 for determining if the signal is greater than the predetermined reference level signal, and less than the reference level judged as noise The keyboard and the keyboard unit 130 is characterized in that Wireless telephone room monitor circuit.