JPS6360653A - Telephone equipment - Google Patents

Abstract

PURPOSE:To attain the talking characteristic of a prescribed level by detecting a signal value of a transmission signal or a reception signal so as to increase/ decrease the signal level automatically. CONSTITUTION:The reception signal sent from a talking circuit 1 is sent to a gain adjusting circuit 9 and the signal level of the reception signal is detected by a reception level detection circuit 8. Since control information matched to an amplification gain is given to the gain adjusting circuit 9 in response to the output of the circuit 8, the amplification gain is set in response to the output of the circuit 8, the reception signal is amplified by a predetermined value and the result is outputted as a voice from a receiver 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a telephone device connected to a telephone line.

2. Description of the Related Art A conventional telephone device will be described below with reference to the drawings. FIG. 2 is a block diagram of a conventional telephone device.

In the figure, 1 is a communication path circuit that separates a transmission signal and a reception signal, 2 is a reception circuit into which the reception signal separated by the communication path circuit 1 is input, 3 is a transmission circuit, and 4 is a reception circuit from the reception circuit 2. 5 is a transmitter that sends a transmitting signal to the transmitting circuit 3; e is a receiver amplifying circuit that amplifies the signal output from the communication path circuit 1; 7 is a receiver that outputs a signal from the communication path circuit 1; This is a switch that switches the transmitted signal to either the receiving circuit 2 or the receiving amplifier circuit 6.

The operation will be explained below.

First, a voice signal is sent from the transmitter 5 to the line via the transmitting circuit 32 and the communication path circuit 1. On the other hand, the received and spoken signals are transmitted from the line, separated from the transmitted signal by the communication path circuit 1, and transmitted to the receiver 4 via the receiver circuit 2, where they can be heard as audio.

Then, when the receive signal level is low, selector switch 7
was switched to the receiver amplifier circuit side 6, and the receiver signal was increased to make it audible louder.

Problems to be Solved by the Invention However, in the conventional circuit configuration, the receive level is amplified by a manual selector switch 7, so the level may become too loud depending on the level with the other party, that is, the condition of the line level. , it became necessary to switch the switch 7 to amplify the level every time a call was made. Furthermore, since the level width of the amplification is constant due to switching by the switch 7, it is difficult to adjust the amplification level to the optimum level.

Therefore, the present invention provides a telephone device that can automatically adjust the level.

Means for Solving the Problems In order to achieve the above object, the telephone device of the present invention includes a transmitter for transmitting signals, a receiver for receiving signal signals, and a communication path for separating transmitted signals and received signals. 1 circuit, a signal value detection circuit that detects the signal value of the transmitted signal or the received signal, and a gain adjustment circuit that adjusts the signal value of the transmitted signal or the received signal according to the output of the signal value detection circuit. It is.

Function: With this configuration, the present invention can amplify a signal according to the magnitude of the signal value, and a certain level of speech characteristics can be achieved.

Embodiment A telephone device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a telephone device in one embodiment of the present invention. In this figure, the same parts as those in FIG. 2 are given the same numbers and their explanations will be omitted. Reference numeral 8 denotes a reception level detection circuit that detects the signal level of the reception signal sent from the communication path circuit 1, and 9 a gain adjustment circuit that amplifies or attenuates the signal value according to the output from the reception level detection circuit 8.

The operation will be explained below.

First, the reception signal sent from the communication path circuit 1 is sent to the gain adjustment circuit 9, and the signal level of the reception signal is detected by the reception level detection circuit 8. Then, depending on the output of the reception level detection circuit 8, control information for adjusting the amplification gain is provided from the reception level detection circuit 8 to the gain adjustment circuit 9.

The gain adjustment circuit 9 supplied with this control information sets an amplification gain according to the output of the listening level detection circuit 8, and the receiving signal is amplified by a predetermined value and outputted as voice from the receiver 4.

In this embodiment, only the received signal is amplified, but it goes without saying that the transmitted signal can also be amplified using the same configuration.

Further, in this embodiment, only the amplification of the signal has been described, but it goes without saying that an attenuation circuit can be provided as desired to optimize the speech level.

Effects of the Invention As described above, the present invention detects the signal value of a transmitted signal or a received signal and automatically amplifies or attenuates the signal level accordingly, so that it is possible to always communicate at a constant level.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional telephone device. 1...Talking path circuit, 3...Talking circuit,
4...Telephone receiver, 5...Transmitter, 8...
... Reception level detection circuit, 9... Gain adjustment circuit.

Claims (1)

[Claims] A telephone transmitter that transmits a signal, a receiver that receives a signal, a communication path circuit that separates the transmitted signal and the received signal, a signal value detection circuit that detects the signal value of the transmitted signal or the received signal,
A telephone device comprising: a gain adjustment circuit that adjusts a signal value of a transmitted signal or a received signal according to an output of the signal value detection circuit.