Accompanying sound balance circuit between TV receiver channels

A technology of TV receiver and equalization circuit, which is applied in the direction of TV, color TV, color TV parts, etc., can solve the problem of unbalanced sound, achieve the effect of sound balance and avoid sound unbalanced phenomenon

Inactive Publication Date: 2009-06-10
韩明智
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This application proposes a sound equalization circuit in order to overcome the phenomenon of unbalanced sound among television receiver channels

Method used

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  • Accompanying sound balance circuit between TV receiver channels
  • Accompanying sound balance circuit between TV receiver channels

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Embodiment 1, during implementation, components can be installed on the circuit board according to the circuit diagram in FIG. 1 . The circuit outside the virtual frame in Fig. 1 is an audio amplifier circuit composed of TDA1013B integrated circuit, which belongs to the prior art, and will not be described in detail here.

[0014] The connection relationship of the negative pressure freewheeling circuit is as described in the summary of the invention, and will not be described in detail again. The parameters of the main components are marked in the attached drawings.

[0015] The diodes in Figure 1 can be 1N5404 or 1N4007.

Embodiment 2

[0016] Embodiment 2, as shown in Figure 2 during implementation, is basically the same as Embodiment 1, except that the optocoupler PC817 is replaced by a triode BG1. When in use, a resistor R3 needs to be connected to the collector of the triode BG1, and a power supply of 7V is connected through the resistor R3.

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PUM

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Abstract

The invention discloses an accompanying sound balancing circuit among channels of a television receiver, which comprises an audio amplifier circuit and a negative-voltage afterflow circuit. The negative-voltage after-flow circuit consists of five diodes, four capacitors, two variable resistors and an optical coupler PC817, which are connected. Negative voltage of the circuit has afterflow function on positive voltage; and during rectification of the positive voltage and the negative voltage, because the negative voltage has the afterflow function on the positive voltage, the circuit realizes average voltage control of a peak value. The circuit realizes balance of accompanying sound among the channels of a television, avoids imbalance of sound when an audience switches television channels, and prevents tuning once when the audience switches to a channel.

Description

technical field [0001] This application relates to television receivers. Background technique [0002] At present, the accompanying sound of each channel of the TV receiver is unbalanced. When changing channels, sometimes the accompanying sound is too loud, and sometimes the accompanying sound is too small to be heard. The TV viewer needs to change the channel to adjust the volume once. Therefore, the sound addition and subtraction and channel addition and subtraction of the remote control became the first damaged buttons. Contents of the invention [0003] The present application proposes a sound equalization circuit in order to overcome the phenomenon of unbalanced sound among television receiver channels. The equalizer circuit is added to the sound channel circuit before the sound power amplifier of the original TV receiver, so that after the channel is changed, regardless of the size of the sound signal, it is adjusted to a uniform level by the equalizer and sent to t...

Claims

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Application Information

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IPC IPC(8): H04N5/60
Inventor 韩明智
Owner 韩明智
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