Published:2011/3/23 4:49:00 Author:may | Keyword: superhigh frequency power amplifier
1W superhigh frequency power amplifier circuit is shown in the following diagram:
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Published:2011/5/3 3:07:00 Author:Rebekka | Keyword: Motor reversing control
Motor reversing control circuit diagram. (View)
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Published:2011/5/3 2:56:00 Author:Felicity | Keyword: Circuit of Simple Production of Wireless Headphones,
Circuit of Simple Production of Wireless Headphones is showed in the picture above. (View)
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Published:2011/5/3 2:59:00 Author:Felicity | Keyword: Internal Circuit,
NTA4153N、NET4153N Internal Circuit is showed in the picture above. (View)
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Published:2011/5/3 3:05:00 Author:Rebekka | Keyword: Light load, energy-saving process
Light load energy-saving process circuit diagram. (View)
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Published:2011/5/3 3:04:00 Author:Ecco | Keyword: internal circuit , typical application
The working principle is shown in Fig. It shows the internal circuit diagram and typical application circuit of EC189 4 × 4 dot matrix sound and light control circuit. It is mainly composed of the amplification circuit / rectifier, voltage-controlled oscillator (VC0), counter / decoder, drive and power supply voltage regulator and other components.
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Published:2011/5/3 3:04:00 Author:Rebekka | Keyword: Negative sequence, voltage-phase protection
Negative sequence voltage-phase protection circuit diagram. (View)
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Published:2011/5/3 3:03:00 Author:Rebekka | Keyword: zero-phase protection, Line current
Line current zero-phase protection circuit diagram. (View)
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Published:2011/5/3 3:01:00 Author:Rebekka | Keyword: Electromagnetic, speed governing control
Electromagnetic speed governing control circuit diagram. (View)
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Published:2011/5/3 2:58:00 Author:Nicole | Keyword: Santana 2000, fuel injection motor, car wiper, washing
57-wiper motor (View)
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Published:2011/5/3 1:31:00 Author:Felicity | Keyword: Internal Circuit Diagram,
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Published:2011/5/3 1:39:00 Author:Felicity | Keyword: Internal Circuit,
NTJS4405N Internal Circuit is showed in the picture above.
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Published:2011/5/3 2:51:00 Author:Felicity | Keyword: Internal Circuit,
NTGD1100L、NTGD1155L Internal Circuit is showed in the picture above. (View)
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Published:2011/5/3 2:51:00 Author:Rebekka | Keyword: Low power DC, speed governing
Low power DC speed governing circuit diagram. (View)
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Published:2011/5/3 2:46:00 Author:TaoXi | Keyword: Small, bed listening system
The small bed listening system circuit is as shown. This system uses two TDA2822M and has the features of small, simple and good sound, particularly enhanced the bass, so it is very suitable for the fans who live in the dormitory.
IC1, IC2 are the stereo power amplifier integrated circuit TDA2822M, the two-channel power amplifier circuit is composed of IC1, the audio signal gets into the ICl through the resistance R1, R3 and double potentiometer RP1-1, RPl-2, the amplified audio signal promotes the speaker BL1, BL2 to work. IC2 (BTL circuit) constitutes the bass amplifier, switch Sl controls it. Because the BTL circuit power dissipation is high, you need to add the heatsink on IC2. In addition, because there is no low-pass filter installed on the bass amplifier, so in use, you need to use the audio tone control circuit machine or use the small bass speaker to enhance the bass. (View)
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Published:2011/5/3 2:49:00 Author:Felicity | Keyword: Circuit of Wireless Stereo Speakers,
Circuit of Wireless Stereo Speakers is showed in the picture above. (View)
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Published:2011/5/3 2:47:00 Author:Felicity | Keyword: Internal Circuit
NTJD2152P、NTJD2152P Internal Circuit is showed in the picture above. (View)
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Published:2011/5/3 2:46:00 Author:Nicole | Keyword: Santana 2000, fuel injection motor, car, ground point
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Published:2011/5/3 2:41:00 Author:Felicity | Keyword: Internal Circuit
NTJD4105C、NTJD4401C Internal Circuit is showed in the piture above. (View)
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Published:2011/5/3 2:09:00 Author:TaoXi | Keyword: low-frequency, B, power amplifier
The TBA820L, TBA820M, TBA820MS always use as the low-frequency B power amplifier. It can be used in the cassette tape recorders, compact stereo cassette players, computer sound systems.etc.
1. TBA820L, TBA820M, TBA820MS Pin functions and In-circuit
Electrical parameters and the internal equivalent circuits of the TBA820L, TBA820M, TBA820MS are the same, the internal circuit is as shown in figure 1. They are in the 0 pin double row package, the pin functions and data is shown as the table 1.
Table 1. The pin functions and data of the TBA820L/M/MS
2.TBA820L/M/MS main electrical parameters
(1)Limit conditions: power voltage Vcc=16V, Allowed power PD=1W; Output peak current Io=1.5A
(2)Main electrical parameters: In RL = 8Ω, f = lkHz condition, the main electrical parameters are as shown:
* Static current I (OQ) Maximum value: l2mA, Typical value: 4mA.* Power supply voltage Vcc Maximum value: l6V, Minimum value: 3V, Typical value: 6V, 9V, 12V.* open-loop voltage gain G (VO) G(VO)=75dB; when the closed-loop voltage gain is Ri=33Ω, G(VO)=34dB.* Output power Po cc=9V,THD=l0%: maximum Po=1.2W, minimum Po=0.9W.* Harmonic Distortion THD Po=5OOmW,Ri=33Ω: THD=0.8%(Typical)* Input Resistance Ri pin-3's input resistance is 5MΩ.
3.TBA82OL/M/MS Typical Application Circuit
The two kinds of typical application circuit are as shown in figure 2 and figure 3. The former's load is connected to the power. The latter's load is connected to the ground.
Figure2 The typical application circuit of the TBA82OL/M/MS manifold
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