KR0138577B1 - Switching device in the signal path - Google Patents

Abstract

The present invention relates to an apparatus for switching a signal path in order to configure a signal path for a wired telephone call, a wireless telephone call, facsimile transmission and reception, recording and reproducing a voice signal, and sending an automatic answer signal in a communication module of a personal digital assistant. will be.

The conventional switching device has a complicated system configuration because it has independent analog interface logic and analog interface for each terminal such as a telephone, a speaker, a microphone, a wireless telephone, and a facsimile. The disadvantage is that the power consumption is increased.

The present invention, in order to solve the conventional problems as described above, the processor 4 for the path construction and signal processing (recording, playback, transmission and reception) control of each terminal, the microphone to which the voice signal is input, and the voice signal An output speaker, a cellular phone module 8 for transmitting and receiving telephone and facsimile data, a voice signal processor 7 for recording or reproducing a voice signal and performing an automatic answering function, and signal generation of each terminal In accordance with the situation, the switching logic circuit 17 is configured to establish a corresponding signal path by turning on or off each input / output terminal under the control of the processor 4, and control the signal path of the communication module with one switching logic 17. By simplifying the circuit configuration, reducing power consumption, and miniaturizing the information terminal due to the reduction in the number of components, the personal information terminal has been implemented. A communication module, the signal switching device.

Description

Communication module signal switching device of personal information terminal

1 is a block diagram of a conventional signal switching device.

2 is a block diagram of a block of a personal information terminal to which the present invention is applied.

3 is a block diagram of a signal switching device of the present invention.

4 is a detailed circuit diagram showing a switching device embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

8 Cellular Phone Module 13 Analog-to-Digital Converter

14a, 14b, and 16: signal conversion amplifier 17: switching logic circuit

The present invention relates to an apparatus for switching a signal path in order to configure a signal path for a wired telephone call, a wireless telephone call, facsimile transmission and reception, recording and reproducing a voice signal, and sending an automatic answer signal in a communication module of a personal digital assistant. will be.

Conventional portable personal digital assistants can be both wired and wireless telephones in the communication module, facsimile transmission and reception using wired and wireless lines, recording and replaying conversations and voice data of telephones, and in the absence of respondents, automatic answering function. The communication module employs a device for controlling the paths of wired / wireless telephones and audio signal sources. The switching device is bus control logic connected to the system to control the bus as shown in FIG. (1), N analog interfaces (2-1, ..., 2-N) connected to the bus control logic (1) and responsible for analog signal transmission with each terminal, and the respective analog interfaces; It consists of analog interface logic (3-1, ..., 3-N) that is connected to form a signal path with each terminal.

The conventional switching device of such a configuration has independent analog interface logic (3-1, ..., 3-N) and analog interface (2-1,) for each terminal of telephone, speaker, microphone, wireless telephone, facsimile, etc. Since the path is controlled for each independent analog signal path with ..., 2-N), the system configuration is complicated and power consumption is increased.

The present invention can solve the conventional problems as described above, by performing the signal path control of the communication module with a single switching logic to simplify the circuit configuration, reduce power consumption, information terminal due to the reduced number of components It is aimed to provide a communication module signal switching device of a personal information terminal that can secure a long time when applied to a product using a portable battery.

2 is a block diagram of a personal information terminal to which the present invention is applied. As shown in FIG. 2, a control processor 4 and a program for performing a control operation of the processor 4 are stored. ROM 5, RAM 6, which stores data for performing the control operation of the processor 4, and the processor 4 and the cellular phone module 8, and are connected to the voice answering signal and the received voice. A voice signal processor 7 which executes recording and reproduction of recorded voice signals, a cellular phone module 8 which is in charge of wired and wireless transmission and reception of voice signals through a telephone line, and is connected to the processor 4 in the air An analog interface 9 forming a communication path with a telephone network, a hybrid 10 connected to the analog interface 9 to form a voice signal transmission and reception path through a public telephone network, and a hybrid 10 connected to the hybrid network 10; A ring signal detector 12 connected between a telephone signal processing unit 11 (DAA), the telephone signal processing unit 11 and a public telephone network to detect a ring signal, which is controlled by the processor 4, and the processor ( 4) the analog interface (A / D, D /) to form a signal transmission path between the microphone and the speaker, and to perform analog conversion (A / D) of the analog signal or analog conversion (D / A) of the digital signal. A converter 13, the voice signal converter / amplifier 14 connected to the analog interface 13 to convert and amplify a voice signal, and the voice signal converter / amplifier 14 to be connected. An audio interface 15 for transmitting a microphone input signal and a speaker output signal, and a signal conversion amplifier 16 connected between the analog interface 13 and the cellular phone module 8 to amplify a voice signal. It is composed.

Looking at the operation of the information terminal having such a configuration, the processor 4 stores and reads the appropriate data in the ROM 5 and the RAM 6 to execute control of the facsimile transmission, transmission of an auto answer signal, and a wired / wireless telephone call. Done.

The control of communication with a public telephone network (wired telephone, fax transmission and reception, etc.) is performed when the ring signal is detected by the ring signal detector 12 and performs hook on / off control to convert the signal input through the ring signal detector 12 into the DAA (11). Read through the hybrid (10) and the analog interface (9), and also controls the analog interface (13) for a call, and the micro-input voice signal is connected to the audio interface (15) and the signal conversion amplifier (14). It receives the input through the sound transmission, or record the voice signal processor 7, and outputs the voice signal of the other party through the speaker.

In this case, even when the cellular phone is transmitted / received, the cellular phone module 8, the microphone, the speaker, and the voice signal processor 7 are controlled as described above to transmit or record the response through the microphone and to record the voice signal of the other party. Or output control via the speaker.

When performing a series of communication control as described above, it is necessary to appropriately control and control each voice signal source and a signal transmission path such as a wired / wireless telephone, a facsimile, an answering machine, and the like.

This configuration has one processor in the system part, and in the communication module part, only one analog interface chip and one A / D and D / A conversion chip are used to detect various signal occurrences of different characteristics and to track each path. Apparatus for properly opening and closing (on, off), the reproduction audio signal from the signal conversion amplifier 16 connected to each input / output terminal P1a-P6a, P1b-P6b in the switching logic circuit 17, micro From the user's voice signal input through the signal conversion amplifier 14a, the other party's voice signal input from the cellular phone module 8, the output through the signal conversion amplifier 14a of the voice signal, and recording each voice signal. The output to the analog-to-digital converter 13, the wireless fax transmission path will be configured appropriately.

The configuration of the signal transmission path for each of these cases is as follows: when a call is received from the cellular phone [1], when recording or playing a normal conversation (conference content, etc.) [2], when using a wireless facsimile [3] If you call without recording or playing the contents of [4] and if you are performing the answering machine [5] are described as follows.

[One]. Incoming call from cellular phone

In this case, the switching logic circuit 17 connects (switches on) the input terminal P4a and the output terminal P4b under the control of the processor, connects the input terminal P5a and the output terminal P5b, and inputs the same. The terminal P2a and the output terminal P2b are connected, and the input terminal P1a is connected to the output terminal P1b.

When the signal transmission path is established in this way, the other party's voice signal input through the cellular phone module 8 is output from the output terminal Tx of the cellular phone module 8 to the input terminal P4a of the switching logic circuit 17. Input and output to the output terminal (P4b) and output to the speaker through the signal conversion amplifier 14b, while being input to the input terminal (P5a) of the switching logic circuit 17 is output to the output terminal (P5b) The digital signal is converted into a digital signal through the analog digital converter 13 and then recorded by the voice signal processor 7.

In addition, the voice signal of the user who responds is input to the microphone, and is input to the input terminal P2a of the switching logic circuit 17 through the signal conversion amplifier 14a and output to the output terminal P2b. The microphone voice signal is input to the input terminal P1a of the switching logic circuit 17 through the signal conversion amplifier 14a, and is transmitted to the other party through the input terminal Rx. The signal output to the output terminal P1b is also input to the analog digital converter 13, converted into a digital signal, and recorded by the audio signal processor 7.

[2]. Simple recording and playback of common conversations

In this case, under the control of the processor, the switching logic circuit 17 connects the input terminal P1a to the output terminal P1b and the input terminal P3a to the output terminal P3b.

Therefore, in this case, the signal input from the microphone through the signal conversion amplifier 14a is provided to the analog digital converter 13 through the input terminal P1a and the output terminal P1b, and recorded. The voice signal processor 7 The recorded content reproduced by the output through the signal conversion amplifier 16 is output to the speaker via the signal conversion amplifier 14B through the input terminal P2a and the output terminal P3b of the switching logic circuit 17. This allows you to listen to what was recorded.

[3]. Wireless fax transmission

In this case, the switching logic circuit 17 connects the input terminal P4a to the output terminal P4b and the input terminal P5a to the output terminal P5b under the control of the processor.

In this way, when the facsimile data is inputted from the output terminal Tx of the cellular phone module 8, a data receiving path is formed from the path of the input terminal P5a to the output terminal P5b, and the output of the cellular phone module 8 is output. From the terminal Tx, a path consisting of the input terminal P4a, the output terminal P4b, the signal conversion amplifier 14b, and the speaker of the switching logic circuit 17 is established to generate a fax sound (beep beeping). ) Will be printed.

[4]. If you just call without recording

In this case, the input terminal P2a and the output terminal P2b of the switching logic circuit 17 are connected, and the input terminal P4a and the output terminal P4b are connected.

Accordingly, the user's response is transmitted from the microphone to the counterpart via the signal conversion amplifier 14a-the input terminal P2a-the output terminal P2b-the cellular phone module 8, and the voice signal of the counterpart is transmitted to the cellular phone module. From (8), it is output to the speaker via the input terminal P4a, the output terminal P4b, and the signal conversion amplifier 14b of the switching logic circuit 17.

[5]. Perform the auto answer function

In this case, the input terminal P6a of the switching logic circuit 17 is connected to the output terminal P6b, the input terminal P2a is connected to the output terminal P2b, and the input terminal P4a is the output terminal P4b. )

Therefore, the answering machine message signal from the voice signal processor 7 is input through the signal conversion amplifier 16 and the cellular phone module (P6a) and the output terminal (P6b) of the switching logic circuit 17. 8) is inputted to the input terminal (Rx) and transmitted to the other party, the call with the other party after the automatic answer is terminated, the input terminal of the microphone input terminal (P2a)-output terminal (P2b)-cellular phone module (8) A path of Rx and an output terminal Tx, an input terminal P4a, an output terminal P4b, and a speaker of the cellular phone module 8 are performed.

4 is a diagram showing a detailed circuit of the main part when the communication module signal switching device of the personal information terminal of the present invention is applied to the information terminal of FIG. 2, and the same components are denoted by the same reference numerals. Overlapping descriptions are omitted, and in this circuit configuration, analog switch chips 17a and 17b are used to configure the switching logic circuit, and signals are transmitted using the analog interface (analog digital converter 13) and the multiplexer 18. It is supposed to perform

As described above, according to the communication module signal switching device of the personal information terminal of the present invention, it is possible to reduce the size and weight of the information terminal product due to the reduction of the number of mounting parts, and to implement the low power information terminal due to the reduction of the number of mounting parts. It can be applied to portable multimedia products or products using a small facsimile, a portable phone and a portable battery.

Claims (6)

Processor 4 for path construction and signal processing (recording, playback, transmission and reception) control of each terminal, a microphone for inputting a voice signal, a speaker for outputting a voice signal, and a cellular phone for transmitting and receiving telephone and fax data. A module 8, a voice signal processor 7 which is responsible for recording or reproducing a voice signal and performs an automatic response function, an input terminal P1a or P2a connected to the microphone, and a speaker side An output terminal P3b (P4b), an output terminal P2b (P6b) connected to the input terminal of the cellular phone module 8, an input terminal P4a connected to the output terminal of the cellular phone module 8 ( P5a), an input terminal P3a (P6a) connected to the voice signal processor output side, and an output terminal P2b (P5b) connected to the voice signal processor input side, and the processor 4 according to the signal generation situation of each terminal. To control each input / output terminal on or off Personal data communication module, the signal switching device of a terminal by a switching logic circuit 17 which establish a signal path, characterized by configured. The method of claim 1, wherein the switching logic circuit 17, when using a telephone from a cellular phone, connects the input terminal P1a to the output terminal P1b to switch to a path for recording the user's voice input through the microphone. To connect the input terminal (P2a) with the output terminal (P2b) to switch to the path for transmitting the user input the microphone to the cellular phone, and connect the input terminal (P4a) with the output terminal (P4b) to the other party from the cellular phone And a switching logic circuit for switching the audio signal to a path for outputting to the speaker and for connecting the input terminal P5a to the output terminal P5b to a path for recording the other party's voice signal from the cellular phone. Communication module signal switching device of personal information terminal. The method of claim 1, wherein the switching logic circuit 17, once recording the conversation content, connects the input terminal P1a with the output terminal P1b to switch to a path for recording the micro-input audio signal. And a switching logic circuit configured to connect the input terminal P3a with the output terminal P3b to switch the path of outputting the reproduced voice signal to the speaker when playing the recorded contents. Signal switching device. 2. The switching logic circuit (17) according to claim 1, wherein the switching logic circuit (17) connects the input terminal (P5a) with the output terminal (P5b) in the case of facsimile use to switch the digital conversion of the received data and the write path, and the input terminal ( Communication module signal switching device of the personal information terminal characterized in that it comprises a switching logic circuit for connecting P4a) to the output terminal (P4b) to switch the fax response sound to the speaker. The cellular phone according to claim 1, wherein the switching logic circuit (17) connects the input terminal (P2a) with the output terminal (P2b) to the cellular phone when the cellular phone does not record the contents. Personal information characterized in that it comprises a switching logic circuit for switching to a path for transmitting to the path to output the voice signal from the cellular phone to the speaker by connecting the input terminal (P4a) with the output terminal (P4b). Communication module signal switching device of the terminal. 2. The switching logic circuit of claim 1, wherein the switching logic circuit 17 switches to a path for transmitting a reproduction response signal to the cellular phone by connecting the input terminal P6a to the output terminal P6b when performing the automatic response function. And connects the input terminal P2a with the output terminal P2b to switch to a path for transmitting a voice signal input to the cellular phone after the response is terminated, and connects the input terminal P4a with the output terminal from the cellular phone. The communication module signal switching device of the personal information terminal, characterized in that for switching to a path for outputting the voice of the other party to the speaker.