CN2545738Y - Automatic protection and failure warning device of power amplifier - Google Patents

Abstract

The utility model discloses an automatic protection and failure warning device of a power amplifier, which is composed of a casing and an electronic circuit, wherein the electronic circuit comprises a sampling amplifying circuit (1), a delay overload short-circuit control circuit (2), an executing circuit (3) and a voice prompting circuit (4). The utility model has the advantages of novel design, simple circuit, etc. Once the phenomena of overload, short circuit, etc. occur, the utility model can cut off the electric connection between the load and the power amplifier, and can simultaneously send out voice prompting signals to prompt the users to rapidly remove the failure, so the breakage of the power amplifier can be avoided, and the failure rate of the power amplifier can be decreased.

Description

A kind of power amplifier is protection and failure warning device automatically

The utility model relates to a kind of automatic protection and failure warning device that is used for power amplifier, belongs to electronic technology field.

Power amplifier is a kind of audio amplification device commonly used.Because phenomenons such as the overload that load took place, short circuit very easily cause the damage of power amplification devices such as sound amplifier, this phenomenon accounts for the overwhelming majority of power amplification device failure rate.Install an overload light on the power amplification device that has additional,, often do not have warning function by day because the brightness of indicator light is low, special all the more so under the transaudient situation of remote control.

The purpose of this utility model is to provide phenomenons such as a kind of short circuit that can take place load, overload to protect and can carry out the power amplifier protection and failure warning device automatically of voice suggestion automatically.

The utility model is realized by following technical solution: a kind of power amplifier is protection and failure warning device automatically; it is made up of shell and electronic circuit; it is characterized in that: in electronic circuit; sampling amplification circuit (1) connects time-delay overload short-circuit control circuit (2), and time-delay overload short-circuit control circuit (2) connects executive circuit (3) and voice warning circuit (4) respectively.

Another special character of the utility model is: in sampling amplification circuit (1), and triode Q ₁Base stage pass through R ₁Link to each other with signal input part and pass through R respectively ₄, C ₁Ground connection, grounded emitter, collector electrode passes through R ₂Connect power supply and pass through R ₃Link to each other with the signal input part of time-delay overload short-circuit control circuit (2); In time-delay overload short-circuit control circuit (2), IC ₁1,2,3 pin link to each other and pass through C ₂Ground connection, 2 pin also link to each other with the signal output part of 6 pin and sampling amplification circuit (1), and 1 pin also links to each other with executive circuit (3) as signal output part, 7 pin ground connection, and 8 pin pass through C ₄Ground connection, 9 pin link to each other with voice warning circuit (4), and 11 pin pass through C ₃Ground connection, 12,14 pin pass through R respectively ₆, R ₅Link to each other with 13 pin, 12 pin also pass through R ₆Meet power supply V _CcIn executive circuit (3), Q ₃Emitter meet IC in the time-delay overload control short circuit (2) ₁1 pin link to each other and pass through R ₁₀Link to each other with base stage, base stage is also passed through R ₉Ground connection, collector electrode passes through R ₈With Q ₂Base stage link to each other Q ₂Grounded emitter, collector electrode links to each other with controlled circuit by relay J and passes through R ₇, D ₉Ground connection, D ₈Be connected in parallel on the two ends of J; IC in voice warning circuit (4) ₂4 pin ground connection and pass through R ₁₁Link to each other with 7 pin, 7 pin are by the C of series connection ₅, R ₁₂As signal output part, 8 pin pass through R ₁₃Link to each other the IC in 9 pin and the time-delay overload short-circuit control circuit (2) with 12 pin ₁9 pin link to each other, 12 pin also connect Vcc.

The utlity model has advantages such as modern design, circuit be simple, in case phenomenons such as load overload, short circuit take place, remove and to cut off beyond being electrically connected of load and power amplifier, also send the voice suggestion signal simultaneously, the prompting user fixes a breakdown rapidly, thereby avoided the damage of power amplifier, reduced the failure rate of power amplifier.

Accompanying drawing and drawing explanation.

Fig. 1-electric functional-block diagram of the present utility model,

Fig. 2-electrical schematic diagram of the present utility model.

In the drawings, 1-sampling amplification circuit 2-time-delay overload short-circuit control circuit 3-executive circuit 4-voice warning circuit.

For understanding the utility model better, do with further detailed description below in conjunction with embodiment.

With reference to Fig. 1, Fig. 2.At sampling amplification circuit (1), triode Q ₁Base stage pass through R ₁Link to each other with signal input part and pass through R respectively ₄, C ₁Ground connection, grounded emitter, collector electrode passes through R ₂Connect power supply and pass through R ₃Link to each other with the signal input part of time-delay overload short-circuit control circuit (2); In time-delay overload short-circuit control circuit (2), IC ₁1,2,3 pin link to each other and pass through C ₂Ground connection, 2 pin also link to each other with the signal output part of 6 pin and sampling amplification circuit (1), and 1 pin also links to each other with executive circuit (3) as signal output part, 7 pin ground connection, and 8 pin pass through C ₄Ground connection, 9 pin link to each other with voice warning circuit (4), and 11 pin pass through C ₃Ground connection, 12,14 pin pass through R respectively ₆, R ₅Link to each other with 13 pin, 12 pin also pass through R ₆Meet power supply V _CcIn executive circuit (3), Q ₃Emitter meet IC in the time-delay overload control short circuit (2) ₁1 pin link to each other and pass through R ₁₀Link to each other with base stage, base stage is also passed through R ₉Ground connection, collector electrode passes through R ₈With Q ₂Base stage link to each other Q ₂Grounded emitter, collector electrode links to each other with controlled circuit by relay J and passes through R ₇, D ₉Ground connection, D ₈Be connected in parallel on the two ends of J; IC in voice warning circuit (4) ₂4 pin ground connection and pass through R ₁₁Link to each other with 7 pin, 7 pin are by the C of series connection ₅, R ₁₂As signal output part, 8 pin pass through R ₁₃Link to each other the IC in 9 pin and the time-delay overload short-circuit control circuit (2) with 12 pin ₁9 pin link to each other, 12 pin also connect Vcc.

In the present embodiment, IC ₁Be YK-01 pattern piece integrated circuit, IC ₂Be YT-01 type speech IC, Q ₁, Q ₂Be 2SC9018 type triode, Q ₃Be 3CG21 type triode, J is the small-sized sealing electromagnetic relay.

Claims (2)

1, a kind of power amplifier protection and failure warning device automatically; it is made up of shell and electronic circuit; it is characterized in that: in electronic circuit; sampling amplification circuit (1) connects time-delay overload short-circuit control circuit (2), and time-delay overload short-circuit control circuit (2) connects executive circuit (3) and voice warning circuit (4) respectively.

2, power amplifier according to claim 1 protection and failure warning device automatically is characterized in that: in sampling amplification circuit (1), and triode Q ₁Base stage pass through R ₁Link to each other with signal input part and pass through R respectively ₄, C ₁Ground connection, grounded emitter, collector electrode passes through R ₂Connect power supply and pass through R ₃Link to each other with the signal input part of time-delay overload short-circuit control circuit (2); In time-delay overload short-circuit control circuit (2), IC ₁1,2,3 pin link to each other and pass through C ₂Ground connection, 2 pin also link to each other with the signal output part of 6 pin and sampling amplification circuit (1), and 1 pin also links to each other with executive circuit (3) as signal output part, 7 pin ground connection, and 8 pin pass through C ₄Ground connection, 9 pin link to each other with voice warning circuit (4), and 11 pin pass through C ₃Ground connection, 12,14 pin pass through R respectively ₆, R ₅Link to each other with 13 pin, 12 pin also pass through R ₆Meet power supply V _CcIn executive circuit (3), Q ₃Emitter meet IC in the time-delay overload control short circuit (2) ₁1 pin link to each other and pass through R ₁₀Link to each other with base stage, base stage is also passed through R ₉Ground connection, collector electrode passes through R ₈With Q ₂Base stage link to each other Q ₂Grounded emitter, collector electrode links to each other with controlled circuit by relay J and passes through R ₇, D ₉Ground connection, D ₈Be connected in parallel on the two ends of J; IC in voice warning circuit (4) ₂4 pin ground connection and pass through R ₁₁Link to each other with 7 pin, 7 pin are by the C of series connection ₅, R ₁₂As signal output part, 8 pin pass through R ₁₃Link to each other the IC in 9 pin and the time-delay overload short-circuit control circuit (2) with 12 pin ₁9 pin link to each other, 12 pin also connect Vcc.

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