KR960027508A - Automatic Level Control Device and Method of Wireless Telephone - Google Patents

Abstract

The present invention relates to an automatic level control politics and method of a wireless telephone, and to control the level of reception to solve a problem in which an unstable call is received because a voice and a dial tone of a wireless telephone are received regardless of the surrounding environment on a conventional telephone line or a line. The automatic level control device is configured to operate the Levec detector and the level control unit. The reference level search process searches whether the reception level required by the call of the other party is a predetermined reference level, and the reception level state by the reference level search process. Accordingly, the reception level control process for making a call with a constant voice and a dial tone by adjusting the reception level has the effect of maximizing the efficiency of the call by the user making a good call.

Description

Automatic Level Control Device and Method of Wireless Telephone

Since this is an open matter, no full text was included.

1 is a blow block diagram of an automatic level control apparatus of a wireless telephone of the present invention, FIG. 2 is a detailed circuit block diagram of a level control unit according to FIG. 1, and FIG. 3 is a flowchart of an automatic level control process according to the present invention.

Claims (5)

A duplexer 10 for separating high frequency signals transmitted and received by an antenna ANT, a receiving unit 20 for receiving, amplifying and demodulating a transmission signal from a fixing device through the duplexer 10, and the receiving unit ( A decompression unit 30 which decompresses the signals of the amplified and demodulated voices and the dial tone output from 20, and a level detector which detects the level of the voice and the dial tone through the decompression unit 30 in comparison with a predetermined reception reference level ( 35, the central processing unit 40 for controlling all parts, and the level of the voice and the dial tone received by the control of the central processing unit 40 which has recognized the reception level comparison detection state of the level detecting unit 35 A level control section 45 for controlling to be kept constant, a speaker amplifying section 50 for amplifying and outputting the levels of the voice and the dial tone controlled by the level bearing section 45 to the speaker SPK, and at the time of transmission The voice signal input through the microphone (MIC) The central processing unit is a microphone amplifier 55 to amplify, a compression unit 60 for compressing the signal amplified by the microphone amplifier 55, and the voice and data compressed through the compression unit 60 Automatic level control apparatus for a radiotelephone comprising a transmitter 70 for amplifying and modulating and transmitting through the duplexer 10 and an antenna under the control of 40. The signal limiting unit of claim 1, wherein the level control unit 45 limits the current and outputs the signal to the speaker amplifying unit 50 in order to maintain a change in the level received through the expansion unit 30 at a constant level. 45b) and a signal switching unit 45a for switching the signal limiting unit 45b to be driven by a control signal of the central processing unit 40 according to the state of the reception level output from the level detecting unit 35. Automatic level control device for a wireless telephone, characterized in that consisting of. According to claim 1 or 2, wherein the signal limiting section 45b is to adjust the received current output from the expansion section 30 compared to a predetermined reference reference level to adjust the detected current to the current of the reference level The automatic level control device for a radiotelephone comprising: a capacitor (C1) and first to fourth resistors (R1 to R4). A reference level search process for searching whether the reception level according to the call request of the other party is a predetermined reference level, and a reception level for making a call with a constant voice and a dial tone by adjusting the reception level according to the reception level state by the reference level search process. An automatic level control method for a wireless telephone made of a control process. 5. The method of claim 4, wherein the reception level control process includes comparing a level of a received voice and a dial tone with a predetermined reference level, and when the comparison is at a predetermined reference level, operating the second transistor Q2 to set the reference volume state. Maintaining the step; and determining whether or not the reference level is higher than the predetermined reference level and operating the first transistor Q1 of the level controller 45 to reduce the reception level if the reference level is higher than the predetermined reference level. And comparing the level of the dial tone with a predetermined reference level to determine whether the level is less than the predetermined reference level and operating the third transistor Q3 of the level controller 45 to increase the reception level if the level is less than the predetermined reference level. Automatic level control method of a wireless telephone, characterized in that consisting of. ※ Note: The disclosure is based on the initial application.