JPH0115244Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a data selection circuit that separates data signals (digital signals) and audio signals, etc. mixed in a transmission signal in wireless communication, and inputs only the data to an arithmetic processing unit. .

Generally, in a data communication system using wireless communication, the same transmission path may be used for data exchange and voice transmission, such as by using the same frequency.

Furthermore, due to the nature of wireless communication, interference may occur, and it is not always the case that only original data is input to the arithmetic processing device. Therefore, signals other than data, such as voice and noise, are read into the arithmetic processing unit as data, which causes malfunctions.

An object of the present invention is to provide a data selection circuit for data communication that solves the above-mentioned problems in data communication and can automatically read only the original data into an arithmetic processing unit.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below based on drawings that are embodiments thereof.

In the figure, 1 is a transceiver, which consists of a receiver R and a transmitter T, and OUT is a signal output terminal of the receiver R. 2 is an arithmetic processing unit, and the output terminal
The signal at OUT can be read or data can be sent from the arithmetic processing device 2 to the transmitter T. 3 is the signal output terminal of the above receiver R
It is an identification code detection section whose input end is connected to OUT, and opens and closes the switching section 4 by detecting an identification code added in advance to the data being sent. The switching unit 4 is connected between the receiver R and the arithmetic processing unit 2, and is closed by a signal from the identification code detection unit 3 indicating that an identification code is present, and opened by a signal indicating that an identification code is not present. It's summery. Note that an amplifier A may be provided between the switching section 4 and the receiver R. 5 is a transmitting/receiving switching unit provided between the switching unit 4 and the arithmetic processing device 2, and is adapted to selectively connect the arithmetic processing unit 2 to the receiver R side or the transmitter T side; 6 is a transmitting/receiving switching unit; This is a signal detection section that controls the transmission/reception switching section 5 according to the low frequency output at the signal output terminal OUT. Reference numeral 7 is provided between the transmission/reception switching section 5 and the transmitter T, and in response to a signal from the transmission/reception switching section 5 indicating data transmission, the microphone circuit MC is disconnected and the data from the arithmetic processing device 2 is transmitted to the transmitter T.
An audio/data switching unit 8 is an identification code adding unit provided between the audio/data switching unit 7 and the transmission/reception switching unit 5, and is designed to input data to the side of the arithmetic processing device 2. The above-mentioned identification code is added to the beginning of the data signal inputted from the transmitting/receiving switching section 5.

In the above configuration, to explain an example of its operation, when receiver R is in a receiving state, noise, voice, or a data signal without a specific identification code is output from its signal output terminal OUT. Then, the identification code detection section 3 outputs a signal to cut off the switching section 4, and the arithmetic processing device 2 is cut off from the receiver R. Note that since the signal detection unit 6 does not have a function to identify the identification code, even if the signal at the signal output terminal OUT is a voice, it will detect this, control the transmission/reception switching unit 5, and send it to the arithmetic processing unit. However, since the switching unit 4 is set to the cutoff state as described above, no signal is input to the arithmetic processing unit 2. Next, if the signal from the signal output terminal OUT is a data signal with a specific identification code, the signal detection section 6 detects the signal and controls the transmission/reception switching section 5 in the same manner as in the above operating state. , the arithmetic processing device 2 and the switching section 4 are joined together. Further, since the switching section 4 is set to the connected state by a signal from the identification code detecting section 3 indicating the presence of a data signal, the arithmetic processing unit 2 is connected to the signal output terminal OUT, and data is read.

The above operation is when receiving data, but
When transmitting data, first, a signal indicating that data is to be transmitted is input from the arithmetic processing device 2 to the transmission/reception switching unit 5. In response to a signal from the arithmetic processing unit 2, the transmission/reception switching section 5 disconnects the microphone circuit MC of the audio/data switching section 7, connects the modulation signal input section TI of the transmitter T to the identification signal addition section 8 side, and connects the transmitter T to the identification signal addition section 8 side. Set T to transmit state (TC). At the same time, the identification signal adding section 8 generates an identification signal, and the identification signal is input to the transmitter T via the audio/data switching section 7. Subsequently, substantial data is sent from the arithmetic processing device 2, and the data is input to the transmitter T via the identification signal adding section 8 and the audio/data switching section 7.

Therefore, the transmitter T outputs a signal with an identification signal added to the beginning of the data, and the data can be reliably sent to other data receiving devices having similar functions.

According to the data selection circuit for data communication according to the present invention, in a device in which a transceiver reads and sends data in an arithmetic processing unit, an identification signal added to data is detected to identify that the signal is data. By doing so,
It is configured to control the passing and blocking of signals from the receiver to the arithmetic processing unit, and is also configured to add the above-mentioned identification signal to the beginning of the original data to be sent during transmission. from,
Even if data, voice, noise, etc. without identification signals are received, there is no risk that these unnecessary signals will be input to the processing unit, and only the original data with specific identification signals will be selected. You can load it by doing so. Therefore, data communication can be performed using a transmission line mixed with noise and voice, and data communication can be easily performed using a low-quality transmission line. Furthermore, even if the data is regular, data to which no identification signal is added is not read, and malfunctions caused by other signals that do not have an identification code can be significantly reduced.

[Brief explanation of the drawing]

The drawing is a block diagram showing an embodiment of a data selection circuit in data communication according to the present invention. 1... Transmitter/receiver, 2... Arithmetic processing unit, 3...
Identification code detection section, 4... Switching section, 5...
Transmission/reception switching unit, 6...Signal detection unit, 7...Audio/
Data switching unit, 8...Identification code addition unit, R...Receiver, T...Transmitter, OUT...Signal output terminal,
MC...Microphone circuit.

Claims (1)

[Scope of utility model registration request] In an arithmetic processing device in which a transceiver reads and sends data, an identification code detection unit detects an identification code added to the data to identify that the signal is data, and the receiver and the arithmetic processing unit. a switching section connected between the identification code detecting section and the arithmetic processing device and capable of connecting an input path to the arithmetic processing device in response to a signal from the identification code detection section; and a transmission/reception switching unit for selectively connecting the arithmetic processing device to a receiver side or a transmitter side, and controlling the transmission/reception switching unit in accordance with a low frequency output from the receiver. A device is provided between the signal detection unit, the transmission/reception switching unit, and the transmitter, and is configured to disconnect the microphone circuit in response to a signal indicating data transmission from the transmission/reception switching unit, and input data from the arithmetic processing unit to the transmitter side. an identification code addition unit provided between the audio/data switching unit and the transmission/reception switching unit for adding the identification code to the beginning of the data to be transmitted; A data selection circuit in data communication, characterized in that: