Published:2011/8/9 2:26:00 Author:Rebekka | Keyword: Pioneer, power amplifier
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Published:2011/8/9 2:28:00 Author:Rebekka | Keyword: high-precision temperature control
Because the RB changes with temperature, the fc also changes with temperature. Audio decoder phase lock loop uses a single audio decoder integrated circuit IC2 (LM567), the center frequency is xsl-fo = 1/1.1 Rw1C4. The adjustment of W1can setxsl-fotemperature frequency. When the IC1 oscillation frequency is the same with the center of the IC2, fc frequency xsl-fo is consistent. The LM567 outputs low level (8) foot) and makes relay J suck close. It will open the load. (View)
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Published:2011/8/11 2:09:00 Author:Rebekka | Keyword: Single-phase thyristor, electric stove , zero trigger ,
The figure shows the single-phase thyristor zero trigger electric furnace temperature control circuit. This temperature device is composed of the signal detection temperature control circuit, the zero detection circuit, cycle switch, trigger control and digital display etc. Itis used withXCT-101 temperature control meter together. It can monitor the 6 ~ 8 kW single-phase thyristor zero trigger electric furnace temperature. The temperature and thermal insulation are ajustable in 1% ~ 99%. The winding I1 of transformer B1, D1 ~ D4, D6, C1, BG1 and other components form the zero pulse detection circuit, IC2-l (1 / 4 CD4011) is the controlling door, and in the effect of the pulse output by cycle switch (IC1), it outputs a group of zero-crossing detection pulse, which is inverting amplified by BG2 and output by isolated transformer BG3. (View)
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Published:2011/8/11 2:03:00 Author:Rebekka | Keyword: Front Mark Levisin
Front Mark Levisin JC-2 circuit diagram is shown as below.
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Published:2011/8/11 2:03:00 Author:Rebekka | Keyword: BTL PA
LM3886 BTL PA circuit diagram is shown as below.
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Published:2011/8/11 2:03:00 Author:Rebekka | Keyword: V.A.L , push-pull tube amplifier
V.A.L VAA-70 push-pull tube amplifier circuit diagram is shown as below.
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Published:2011/8/11 2:12:00 Author:Rebekka | Keyword: piezo-electric transducer , high-impedance high-fidelity amplifier
The main parameters of the OPA604:
In the automatic control system or some detection system, the sensor piezoelectric devices is often used as sensor. So as to realize the power electrical signals. This kind of sensor equivalent sources has very high resistance and the signal is very weak. So it must also be matching high input impedance amplifier circuit, and the amplify circuit must also have the ability to accurately weaken signal amplifier. The figure gives high fidelity op-amp OPA604 constitute amplifier circuit.
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Published:2011/8/11 2:13:00 Author:Rebekka | Keyword: 30W A-class, OCL post amplifier
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Published:2011/8/11 2:14:00 Author:Rebekka | Keyword: voltage follower
The figure shows the integration op-amp. When the input signal is too big, it may cause damage, even if integrated chip is not damaged, its work state have entered the nonlinear area. Figure (a) shows the circuit of the input signal to + l00V which is still working. The input voltage Vi increased to 3 pins. This circuit is the same phase, its input magnification is + 1, integrated chips is INA106, the chip is specially used for high voltage input follower. It normally uses withourt resistance. (View)
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Published:2011/8/9 2:06:00 Author:Rebekka | Keyword: Eliminating ripple, IOV fixed voltage , power supply
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Published:2011/8/4 21:43:00 Author:Rebekka | Keyword: 12V, 5V , Dual regulated power supply
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Published:2011/8/9 2:05:00 Author:Rebekka | Keyword: 9V Tape Reader, AC and DC , Power Supply
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Published:2011/8/9 2:22:00 Author:Rebekka | Keyword: short-circuit protection, fixed power supply
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Published:2011/8/9 2:21:00 Author:Rebekka | Keyword: 5 V , regulated power supply , doubler rectifier
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Published:2011/8/9 2:18:00 Author:Rebekka | Keyword: 4.5V Precision power
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Published:2011/8/9 2:17:00 Author:Rebekka | Keyword: Simple , constant temperature controllor
Rt1 contacts the contact because of the heated expansion, but IC 6 feet is disconnected since the Rt2 is still at the low level, thus the trigger circuit skins. The temperature continue to rise to the upper limit value, Rt2 is conducted, the corresponding 6 feet potential is inhigh level (6 V), it is larger than 6 x two-thirds = 4 V trigger level. The IC resets, the (3) foot outputs low level, SCR stops and the electric heating wires power supply is disconnected. It stops heating. When the temperature drops, Rt2 will be disconnected. For 555 circuit is self-preservation and it still outputs low level feet by (3). When the temperature drops to the limit value, Rt1 is disconnected. (View)
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Published:2011/8/9 2:13:00 Author:Rebekka | Keyword: Developer temperature control
The figure shows the developer temperature control circuit. When the power supply is open, the temperature is low, the value of the R1 is high, so that the 5G31 outputs high level because the input potential of the positive end is higer than the input potential of the negative end.The relay J suck closes, RL starts to heat because the power supply is open and makes the temperature high. When the temperature rise to the control temperature, the bridge turns to balance. The 5G31 outputs low level because the potential of negative input terminal is higher than the positive input terminal . The relay J is disconnected, RL stops to heat because the power supply is closed. (View)
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Published:2011/8/15 2:35:00 Author:Rebekka | Keyword: Multichannel pressure , gauge inspection
It uses more pieces of MAX1457 to match the monolithic A/D converter and single chip microcomputer to form the multi-channel pressure inspection instrument and the circuit diagram is shown as the chart. In the figure, it uses a piece of 8-1 analog switch CD4051 to receive 8-road sensor signals. The calibration coefficient of the each sensor is stored in 93C66. The output of the CD4051 connects with the ICL7135 4 1/2 bit monolithic A/D converter, then it uses the decoding driver (CD4511) and bit driver (MC1413) to drive 4 1/2 bit LED display. The 8051 single chip microcomputer decides one road sensor signal having completed A/d conversion by the DQS and BUSY signal output by ICL7135. (View)
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Published:2011/8/15 2:25:00 Author:Rebekka | Keyword: Photoelectric isolated amplifier
The figure shows the photoelectric isolated amplifier circuit. The photoelectric isolated amplifier can be used in the automatic control system, the data acquisition system, computer I/O interface and communications equipment. The photoelectric isolated amplifier is also called the photoelectric couplers, this device is a composite shell element that the light emitting components and the light components and packaging in the same relative set. The input and output contacts by light and ithas insulation to electric. It is the the solid component with completely an unique property and function. (View)
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Published:2011/8/11 2:11:00 Author:Rebekka | Keyword: Bias compensation, broadband amplification
The voltage amplifier multiples of the circuit parameters is: Av =-10, the voltage conversion speed is larger than 70 v/u s, half power bandwidth can be up to 400 kHz above, its gain products of bandwidth is about 30 MHz. The working temperature of the LH0003with10-pin metal circular encapsulates is 0 ~85 ℃. The storage temperature is 65 ~ 150 ℃. When it uses the LH0003 chip, its working temperature is 125 ℃ and 55, the storage temperature is 65 ~ 150 ℃. Figure (b) shows the LH0003 / LH0003C integrated chips tube feet arrangment diagram. (View)
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