a92. The A42s triode can be used. The common a92 triode can be usedSubstitute. Because many electronic ballasts are made of a92 triode. The current parameters of a92 triode: ic=500ma, voltage parameters: ucbo=300v/uceo=300v/uebo=6v, power parameters and so on are relatively similar to A42s triode, so in the case of no A42s triode at the time of repair, it can be replaced by a92 triode.
a42Ss is a micropower operational amplifier chip. The chip is A42S, and the body should be LM358, which is a dual operational amplifier, and its interior includes two independent, highPart structure: Output power up to 30 watts, A VO is often 90 dB.
can be replaced directly. The LM1875 and TDA2030 (A) adopt the same TO220B package and have the same pin definition. In terms of parameters, the maximum voltage of LM1875 supports 60V, while that of IDA2030 (A) is 44V.
Different functions D1875: D1875 amplifier chip is designed for video circuit, mainly used in video circuit design applications. LM1875: The integrated circuit is equipped with overload overheating and inductive loadReverse potential safe working protection.
~1V amplification to 0~5V, so the gain G=5. The AD620 is an instrument amplifier, it is not an ordinary op amp, reference to its Datasheet can be seen inside the three op amp structure, gain (magnifying) calculation is as follows - : G= (44K /Rg) 1, Rg is the resistance between pin1 and pin8, so Rg=135k.
With the AD620 as the amplifier circuit, it is easy to amplify the signal 100 times, as long as the external proportional resistance of the first stage of the instrument amplifier is set to 500Ω.
According to the existing components, the single-op amplifier LM741 and OP07 are respectively integrated with the four-op amplifier LM324 and the single-chip integrated coreWith AD620 as the core, four kinds of instrument amplifier circuit schemes are designed.
First, the amplification factor is controlled by adjusting the rg resistance value, Rg is the internal reference resistance, which is 44 kilohm, and rgain is the external amplification resistance. The amplification factor can be controlled by the inverse relationship between rg and rgain. Then add r and cc, cd to achieve a specific waveform through, to achieve the specified waveform amplification.
No! The ad620 is an instrument amplifier, which is a circuit composed of multiple op-amps inside, and - inside is actually the in-phase end of two op-amps respectively. Does not have virtual shortThe characteristics of...
1, replace C324C LM324N HA17324 LM324, L324, YD324, KA324, UPC324 Most easily bought LM324 features: sprint protection output True differential input stage can work on a single power supply: 3V-32V low bias current: Up to 100nA (LM324A) with four op amps per package. Has the function of internal compensation.
2, MCU is an integrated circuit chip, It is the use of very large scale integrated circuit technology to integrate the central processor CPU random access memory RAM, read-only memory ROM, A variety of I/O ports and interrupt systems, timers/timers and other functions (may also include display driver circuit, pulse width modulation circuit, analog multiplexer, A/D converter and other circuits) into a silicon chip A small but perfect computer system.
3, open the remote control shell, short connect the chip (3), (11) foot with the wire, and then quickly press the mute key to enter. short-circuit4), (7) foot exit. (3) : The remote control is DT-0013A. Open the case, there is a hidden key in the middle of volume and channel addition and subtraction, press the mute button to enter, press TV/AV to exit.