CN87208358U

CN87208358U - Amplifier of telephone without edditional power source

Info

Publication number: CN87208358U
Application number: CN198787208358U
Authority: CN
Inventors: 洪海涛; 姚育东
Original assignee: Scientific Researching Section Training Department Air Force Meteorology Colle
Current assignee: Scientific Researching Section Training Department Air Force Meteorology Colle
Priority date: 1987-05-18
Filing date: 1987-05-18
Publication date: 1988-03-30

Abstract

The utility model discloses an amplifier of telephone without an additional power source, belonging to an auxiliary component for improving the performance of telephones, comprising a microswitch, a volume regulator, an amplification indication lamp and an amplifier. The amplifier of telephone without an additional power source is characterized in that the voltage of a telephone circuit is directly adopted as a power source, and an additional power source is not required; the simple line of the amplifier is only composed of a triode transistor and a small amount of resistors and capacitors. The utility model has the advantages of low power consumption, low cost and convenient operation. No adverse effect can be produced to the telephone circuit, the volume can be controlled according to different occasions, and good calling effects can be obtained under the conditions of noisy environments, or bad hearing and weak signals.

Description

Amplifier of telephone without edditional power source

The utility model belongs to communication equipment, is a kind of telephone set auxiliary.

At present, have only in the part magneto telephone set amplifying circuit is housed, and generally do not adorn amplifier in common-battery (or automatically) the formula telephone set.(" phone knowledge question ", People's Telecon Publishing House 1985).In order to make phone in noisy environment or under situations such as remote small-signal of conversing and hearing difference person use, obtain good communication effect, just need the additional telephone amplifier.Not only the complicated price of circuit is expensive for existing telephone repeater, and needs additional power source.

The purpose of this utility model is to provide a kind of additional power source that do not need, and is contained in the telephone repeater with low cost of telephone set inside.

The utility model is made up of switch, volume adjuster, amplifier and amplification indicator light, its characteristics are that amplifier is made of the one-level amplifying circuit that directly is contained in the telephone set, voltage in the employing telephone line adopts the working point of LED stabilizing amplifier and constitutes and amplify indicator light as power supply.Under normal circumstances, because sensitive switch disconnects, amplifier is in off position.When need are used amplifier, as long as depress sensitive switch gently, make it be in on-state, amplifier is an energized, produces the repeating effect, its volume can be by being installed in the volume adjuster control on the mobile phone.Sensitive switch is installed in a side of mobile phone, both can utilize the hand of handgrip machine to press sensitive switch, also can be placed on mobile phone on the desk, make under the side direction that sensitive switch is housed, utilize the mobile phone own wt to press sensitive switch, make amplifier in running order, because volume is bigger, can be placed on mobile phone on the desktop like this, can converse with the other side when helping bending over one's desk working, perhaps note down, also do not need mobile phone is taken for waiting as long for while listening.In order to show whether amplifier is in running order, and light-emitting diode is housed on the support, when lumination of light emitting diode, show that amplifier is in running order.In order to make amplifier can adapt to the variation of line voltage distribution significantly, utilize the stabilized voltage characteristic that has after the LED conducting, LED is connected in the amplifier, for transistor provides stable working point.In order to make amplifier work the time not influence the operate as normal of telephone line, the power consumption of amplifier is 1/10th of a telephone set power consumption only, generally can be controlled in (2～5) mA, not power consumption when amplifier is not worked.Amplifier circuit is simple, only forms with a transistor and a small amount of resistance, electric capacity.The utility model can constitute one with ordinary telephone set, forms novel telephone set, also can be formulated on the various ordinary telephone sets as annex separately, so that improve the performance of telephone set.

The utility model has the advantages that simple in structurely, power consumption is little, and is easy to use, with low cost, can make conversation obtain good effect according to different occasions control volumes.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the circuit theory diagrams that the utility model is connected with ordinary telephone set.

The utility model can take following mode to implement:

Circuit theory as shown in Figure 2, (5) are the circuit diagram of HZ-1 type ordinary telephone set.Amplifier (4) is realized amplification by transistor, utilizes the power supply of telephone line voltage as amplifier (4), and red light emitting diodes LED is as amplifying indicator light (3), and utilizes the working point of its pressure stabilization function stable transistor.Volume adjuster (2) can adopt common small-sized volume control potentiometer, and amplifier is connected with telephone set by sensitive switch (1).Amplifying circuit is contained in the telephone set, amplifies indicator light (3) and is contained on the telephone casing, and sensitive switch (1) and volume adjuster (2) are contained in the mobile phone both sides of telephone set, regulates so that realize the access of amplifier and volume.

Claims

1, the telephone repeater of no additional power source is made up of switch, volume adjuster, amplifier and amplification indicator light, it is characterized in that amplifier is made of the one-level amplifying circuit that directly is contained in the telephone set, voltage in the employing telephone line adopts the working point of LED stabilizing amplifier and constitutes and amplify indicator light as power supply.

2, telephone repeater according to claim 1 is characterized in that the switch of controlling the amplifier operating state adopts sensitive switch (1), and volume adjuster (2) adopts common small-sized volume control potentiometer.

3, telephone repeater according to claim 1 and 2 is characterized in that controlling the sensitive switch (1) of amplifier operating state and the both sides that volume adjuster (2) is installed in telephone bandset.

4, telephone repeater according to claim 1, the amplification indicator light (3) that it is characterized in that being installed on the phone support adopts LED to constitute.