KR20020036344A - Radio frequency signal temperature recompense apparatus - Google Patents

Abstract

PURPOSE: A radio signal temperature compensating device is provided to reduce an error by detecting the temperature of a component using a temperature sensor, and by compensating gains changed in case that the change of gain is generated according to the temperature detected. CONSTITUTION: The first and the second amplifier(10,12) amplify and output radio signals into a level of a fixed radio signal level in case that the radio signals are inputted through an input port. An attenuator(11) attenuates an output of the first amplifier(10) according to a control signal and outputs the output attenuated to the second amplifier(12). A temperature sensor(20) detects the temperature of the first and the second amplifier(10,12). A sensor detection unit(21) receives and reads a signal detected from the temperature sensor(20). In addition, the sensor detection unit(21) outputs an analog signal. A storing unit(22) stores attenuated data. A digital/analog conversion unit(23) converts digital data stored in the storing unit(22) into analog signals. A control unit(24) reads the data stored in the storing unit(22) through the digital/analog conversion unit(23) in case that signals are inputted from the sensor detection unit(21).

Description

Wireless signal temperature compensation device {RADIO FREQUENCY SIGNAL TEMPERATURE RECOMPENSE APPARATUS}

The present invention relates to a wireless signal temperature compensator, and more particularly, to a wireless signal temperature compensator which maintains a constant gain regardless of a characteristic change of a component element due to a temperature change during wireless signal processing in a wireless system base station.

In the conventional wireless signal processing, as shown in FIG. 1, when the first amplifier 10 receives a wireless signal through an input port, the first amplifier 10 amplifies and outputs the first signal to a predetermined wireless signal level. When the first wireless signal is input, since there is no output from the second amplifier 12 (there is no signal detected by the second detection unit 15), the control unit 13 controls the attenuator 11. The signal is output so that the output of the first amplifier 10 is not attenuated. Thereafter, the gain of the input signal detected by the first detector 14 and the gain of the second amplifier 12 detected by the second detector 15 are compared by the controller 13 to obtain the gain changed by the difference. The attenuator 11 is controlled and compensated to maintain a constant gain.

However, as described above, the conventional technique cannot accurately detect the gain due to the characteristic change of the component element due to the temperature change, thereby compensating for the error, thereby increasing the final error width.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and after detecting the temperature of the part using a temperature sensor, the device for compensating for the changed gain when a gain change occurs according to the detected temperature The purpose is to provide.

1 is a schematic view showing the configuration of a conventional wireless signal compensation device.

Figure 2 is an exemplary view briefly showing the configuration of the wireless signal temperature compensation apparatus of the present invention.

3 is an exemplary view showing data corresponding to a temperature stored in a ROM in FIG. 2.

********* Explanation of symbols for the main parts of the drawing **********

10: first amplifier 11: attenuator

12: second amplifier 13, 24: control unit

20: temperature sensor 21: sensor reading unit

22: ROM 23: A / D converter

The configuration of the temperature compensation circuit of the wireless signal processing apparatus of the present invention for achieving the above object comprises: first and second amplifiers for amplifying and outputting a predetermined radio signal level when a radio signal is received through an input port; An attenuator positioned at both ends of the first and second amplifiers to attenuate the output of the first amplifier according to a control signal and output the attenuated output to the second amplifier; A temperature detector for detecting a temperature of the first and second amplifiers and outputting an analog signal (hereinafter referred to as a read signal) according to the first and second amplifiers; A storage unit for storing attenuation data corresponding to gains due to temperature changes; When a read signal is input from the temperature detector, the data stored in the storage unit is read and compared, and accordingly, the gain control unit outputs a control signal to the attenuator.

Hereinafter, an embodiment according to the present invention will be described with reference to the accompanying drawings.

2 is a schematic view showing the configuration of the wireless signal temperature compensation device according to the present invention. As shown in FIG. 2, when a wireless signal is input through an input port, the first and second amplifiers 10 amplify and output a predetermined wireless signal level. 12); An attenuator (11) positioned at both ends of the first and second amplifiers (10, 12) to attenuate the output of the first amplifier (10) according to a control signal and output it to the second amplifier (12); A temperature sensor (20) for detecting a temperature of the first and second amplifiers (10.12); A sensor reader 21 for receiving a signal detected by the temperature sensor 20 and reading the signal to output an analog signal; A storage unit 22 storing attenuation data corresponding to gains due to temperature changes; A digital / analog (D / A) converter 23 for converting digital data stored in the storage 22 into an analog signal; When a read signal is input from the sensor reader 21, the data stored in the storage 22 is read and compared through the D / A converter 23 and then controlled by the attenuator 11 accordingly. The control unit 24 outputs a signal.

Referring to Figure 3 attached to the operation of the embodiment according to the present invention configured as described above are as follows.

FIG. 3 is an exemplary view showing data corresponding to a temperature stored in a ROM in FIG. 2. As shown in FIG. 2, the attenuation dB value to be compensated for by varying the temperature through an experiment is determined in consideration of gain at a final stage. This is then converted into data and stored in storage 22 (the attenuation dB value is stored as a digital value).

Thereafter, when the temperature sensor 20 senses the temperature, the temperature sensor 20 outputs the temperature detected by the sensor reader 21 to the controller 24 as an analog signal (read signal).

When the read signal is input, the controller 24 reads the data (attenuation dB value) stored in the storage 22 through the D / A converter 23 and compares the read signal. According to the comparison result, a corresponding control signal (a constant voltage signal corresponding to the attenuation dB value) is output to the attenuator 11, and the attenuator 11 is provided at both ends of the first amplifier 10 and the second amplifier 12. The gain amplified operation of the signal amplified by the first amplifier 10 according to the control signal may be performed to maintain a constant gain at the last stage of the second amplifier 12 at all times.

As described above, the wireless signal temperature compensating apparatus of the present invention maintains a constant gain regardless of temperature change in the wireless signal processing apparatus of the base station of the wireless system, thereby accurately detecting the gain according to the characteristic change of the component element according to the temperature change. This can prevent the width of the error from increasing.

Claims (3)

First and second amplifiers for amplifying and outputting a predetermined radio signal level when the radio signal is received through an input port; An attenuator positioned at both ends of the first and second amplifiers to attenuate the output of the first amplifier according to a control signal and output the attenuated output to the second amplifier; A temperature detector for detecting a temperature of the first and second amplifiers and outputting an analog signal (hereinafter referred to as a read signal) according to the first and second amplifiers; A storage unit for storing attenuation data corresponding to gains due to temperature changes; And a gain control unit configured to read and compare data stored in a storage unit when a read signal is input from the temperature detector, and output a control signal to the attenuator accordingly. The apparatus of claim 1, wherein the temperature detector comprises: a plurality of temperature sensors detecting the temperatures of the first and second amplifiers; Wireless signal temperature compensation device comprising a sensor reader for receiving the signals detected by the plurality of temperature sensors to read and output the signals. The apparatus of claim 1, wherein the gain control unit comprises: a digital / analog (D / A) conversion unit for converting digital data stored in a storage unit into an analog signal; When a read signal is input from the sensor reader, the controller reads and compares the data stored in the storage through the D / A converter, and accordingly outputs a constant voltage signal corresponding to the attenuation dB value with the attenuator. Wireless signal temperature compensation device, characterized in that.