JP2005167661A - Gain adjusting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gain adjusting method for more simply suppressing the gain variation of the entire radio apparatus due to individual dispersions of components such as semiconductor components constituting the radio apparatus. <P>SOLUTION: When identical components such as semiconductor components constituting a radio apparatus are used for both its receiver and transmitter, the gain variations trend in the same direction. Utilizing this nature, control signals for correcting the variation of the transmitter (or the receiver) are utilized for correcting the variation of the receiver (or the transmitter), thereby reducing the gain adjusting man-hour to a half. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a radio device, and more particularly to a method for correcting gain fluctuations due to variations in components constituting a radio device such as a semiconductor.

  The radio unit is composed of an amplifier, frequency converter (mixer), filter, switch, etc., and gain when the signal is passed through these components. There is a manufacturing variation for each part. The entire wireless unit is a variation obtained by adding these variations. This variation is a change in wireless basic characteristics such as reception sensitivity, adjacent wave selectivity, transmission output level, and adjacent channel leakage power, which are wireless characteristics. The worst value including the variation is the wireless device performance, and the wireless device performance is deteriorated due to the variation.

  Therefore, a method of performing gain measurement after configuring a radio device and correcting variation using a gain variable device or the like is widely used.

  There is also a method of sending the electrical characteristics of the receiving circuit to the transmitting circuit and thereby controlling the output level of the transmitting circuit.

As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
Japanese Patent Laid-Open No. 03-283741

  However, if gain measurement and correction are performed for each wireless device, problems such as an increase in man-hours at the time of shipment and an increase in manufacturing cost occur.

  In view of the above, it is an object of the present invention to correct deterioration in wireless device performance due to variations and prevent deterioration due to variations in wireless performance while suppressing an increase in man-hours and an increase in manufacturing cost.

  In order to achieve the above object, the present invention is applied to, for example, a radio apparatus including a receiving unit and a transmitting unit, and a part of the receiving unit and a part of the transmitting unit are configured by parts such as the same semiconductor. Applies to existing radios. When the circuits of the receiver and transmitter are composed of the same parts, receive the control signal for variation correction of the transmitter (or receiver) using the property that the variation tendency of the gain is the same direction. It is also used for correction of the unit (or transmission unit).

  According to the present invention, the effect obtained by correcting the receiving unit and the transmitting unit once each time, that is, a total of two times, can be almost substituted by one correction.

  According to the present invention, the number of man-hours for correction can be reduced to about half compared to the case where correction is performed.

(First embodiment)
Hereinafter, a gain adjustment method according to a first embodiment of the present invention will be described with reference to the drawings.

  In FIG. 1, 101 is an antenna, 102 is an antenna switch, 103 is a filter 1, 104 is an amplifier 1, 105 is a frequency converter 1, 106 is a filter 2, 107 is a gain variable device 1, and 108 is a frequency converter 2. , 109 is an amplifier 2. 101 to 109 constitute a receiving unit. Further, 112 is an amplifier 3, 113 is a filter 3, 114 is an amplifier 4, 115 is a frequency converter 3, 116 is a frequency converter 4, and 117 is a gain variable unit 2. 101, 102, and 112 to 117 constitute a transmission unit. In order to suppress fluctuations in the transmission output level due to individual variations of the parts constituting the transmission unit, the output 120 of the amplifier 3 (112) is input to the transmission output level detector 119, which is an external measuring instrument, and the level detection is performed. The subsequent output 121 is input to the gain variable device 2 (117), and the feedback loop is configured so that the transmission output level becomes a constant level. The amplifier 1 (104), the frequency converter 1 (105), the amplifier 4 (114), and the frequency converter 3 (115) are integrated in the same semiconductor 1 (110), and the frequency converter 2 (108). ), Amplifier 2 (109), frequency converter 4 (116), and gain variable device 2 (117) are also integrated in the same semiconductor 2 (111). Regarding the gain variation of the receiving unit and the transmitting unit, the variation of the semiconductor 1 (110) and the semiconductor 2 (111) is dominant, and the gain variation tendency of circuits integrated in the same semiconductor Uses the property of being in the same direction, and the output 121 of the transmission output level detector 119 is also input to the gain variable unit 1 (107) to be used for gain correction of the receiving unit. The value of the output 121 after level detection is stored in the memory 118. After the adjustment is completed, the transmission output level detector 119, which is an external measuring instrument, is removed and the feedback loop is canceled, but the value stored in the memory 118 after the cancellation is the gain variable unit 2 (117) and It continues to be supplied to the gain variable device 1 (107). According to the first embodiment, it is possible to correct the gain variation of the reception unit without measuring the output level 122 of the reception unit, and the gain variation correction of the reception unit and the transmission unit can be performed by one operation. This can be realized with a halved man-hour.

(Second Embodiment)
Hereinafter, a gain adjustment method according to a second embodiment of the present invention will be described with reference to the drawings.

  2, 201 is an antenna, 202 is a diversity switch, 203 is a filter 1, 204 is an amplifier 1, 205 is a frequency converter 1, 206 is a filter 2, 207 is a gain variable device 1, and 208 is a frequency converter 2. , 209 is an amplifier 2. The receiving unit 1 is composed of 201 to 209. Reference numeral 212 denotes a filter 3, 213 denotes an amplifier 3, 214 denotes a frequency converter 3, 215 denotes a filter 4, 216 denotes a gain variable device 2, 217 denotes a frequency converter 4, and 218 denotes an amplifier 4. The receiving unit 2 is configured by 201, 202, and 212 to 218. In order to suppress fluctuations in the received output level due to individual variations of the components constituting the receiver 2, the output 221 of the amplifier 4 (218) is input to the received output level detector 220, which is an external measuring instrument, and the level The output 222 after detection is input to the gain variable device 2 (216), and a feedback loop is configured so that the output level of the receiving unit 2 becomes a constant level. The amplifier 1 (204), the frequency converter 1 (205), the amplifier 3 (213), and the frequency converter 3 (214) are integrated in the same semiconductor 1 (210), and the frequency converter 2 (208). ), Amplifier 2 (209), frequency converter 4 (217), and amplifier 4 (218) are also integrated in the same semiconductor 2 (211). The gain variation of the receiving unit 1 and the receiving unit 2 is dominated by the variation of the semiconductor 1 (210) and the semiconductor 2 (211), and the gain of a circuit integrated in the same semiconductor The variation tendency uses the property of being in the same direction, and the output 222 of the reception output level detector 220 is also input to the gain variable unit 1 (207) to be used for gain correction of the reception unit 1. The value of the output 222 after level detection is stored in the memory 219. After the adjustment is completed, the reception level detector 220 which is an external measuring instrument is removed, and the feedback loop is canceled. However, even after the cancellation, the value stored in the memory 219 is the gain variable unit 2 (216) and the gain. It continues to be supplied to the variable device 1 (207). According to the second embodiment, it is possible to correct the gain variation of the reception unit 1 without measuring the output level 223 of the reception unit 1 and the like, and the gain variation correction of the reception unit 1 and the reception unit 2 can be corrected. This can be realized with one operation, and man-hours can be halved.

  As described above, the present invention is useful for correcting gain fluctuations due to component variations of a radio device.

These are block diagrams which show the gain adjustment method which concerns on 1st Embodiment. These are block diagrams which show the gain adjustment method which concerns on 2nd Embodiment.

Explanation of symbols

101 antenna 102 antenna switch 103 filter 1
104 Amplifier 1
105 Frequency converter 1
106 Filter 2
107 Gain variable 1
108 Frequency variable device 2
109 Amplifier 2
110 Semiconductor 1
111 Semiconductor 2
112 Amplifier 3
113 Filter 3
114 Amplifier 4
115 Frequency converter 3
116 Frequency converter 4
117 Gain variable 2
118 Memory 119 Transmission Output Level Detector 120 Amplifier 3 Output 121 Transmission Output Level Detector Output 122 Amplifier 2 Output 201 Antenna 202 Diversity Switch 203 Filter 1
204 Amplifier 1
205 Frequency converter 1
206 Filter 2
207 Gain variable 1
208 Frequency converter 2
209 Amplifier 2
210 Semiconductor 1
211 Semiconductor 2
212 Filter 3
213 Amplifier 3
214 Frequency converter 3
215 Filter 4
216 Gain variable 2
217 Frequency converter 4
218 Amplifier 4
219 Memory 220 Reception output level detector 221 Amplifier 4 output 222 Reception output level detector output 223 Amplifier 2 output

Claims (6)

A component having an amplifying function or a component having an attenuating function is provided in one or a plurality of combinations, a gain variable is provided, and two or more series configured by cascading them are provided. In a circuit in which some or all of the components are made of the same product, the output level of a certain series is detected, and the detected signal is fed back to the gain variable unit of the same series. A gain adjusting method characterized by being configured to feed back to other series gain variablers. 2. The gain adjustment method according to claim 1, wherein one of the series includes two series such that a receiving unit in a radio device and the other series is a transmitting unit. 2. The gain adjustment method according to claim 1, wherein one of the series is a receiving unit in a radio device and includes two series in which the other series is another receiving unit. . The gain adjustment method according to claim 1, wherein the same product is a semiconductor integrated circuit. One of the series includes two series such that a receiving unit in a wireless device and the other series is a transmitting unit, and the same product is a semiconductor integrated circuit. Item 2. The gain adjustment method according to Item 1. One of the series is a receiving unit in a radio device, and two series are provided such that the other series is another receiving unit, and the same product is a semiconductor integrated circuit. The gain adjustment method according to claim 1.

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