 Wysłany: Wto 6:26, 05 Kwi 2011 Temat postu: A practical semiconductor cooling temperature cont |
|
| A practical semiconductor cooling temperature control circuit
Thinking ,jimmy choo cape town, you can get the following circuit program (in four control, for example ), as shown in Figure 2: The sampling probe , the data amplifier and pre- show circuit, the signal amplitude comparator, switch control, circuit switching network . Figure 3 shows the circuit needed to power , this article without discussion . R ~ RJ composed of bridge , and R and ~ R, resistance values are the same or substantially the same, when the measured strain does not produce material objects , attached to the resistance of the material surface RI ( sensor ) resistance remain unchanged No output signal. When the strain , the sensor R, resistance to change , destruction of the bridge balance , so there is a signal to the amplifier input terminal . t choose a smaller resistance , due to the resistance of the bridge has some errors , through the appropriate mediation w music can bridge the two points the voltage to be corrected. Data amplifier by a resistor 324 and some components with the network , which includes two zoom levels. , and form the first stage is busy , the two can be connected in -phase input, high input resistance . The circuit symmetry , they are offset and offset drift, the role of the composition jc differential amplification stage, differential input will be converted into single-ended output. With the formation of a cD radio 』 circuit, if the resistance is R. W2 Then: When & = R , the first -class bulk voltage amplification times were: conductivity of the official site 4 caused by hideous a practical semiconductor temperature control circuit controls the input waveform shown in Figure 4 can be seen, when At different magnitude , the analog switch connected to the trigger of the relay supply voltage difference. The transcripts of 0 ≤ V. ≤. . Time. Suction units, when . ≤ ≤ , the pull , when the mouth ≤ ≤ 3 , the pull , when ≤ ≤ , the pull . On the basis of the comparator on the pressure resistance may also be required to jointly solve the following formula . f / ~ -1 + [51 [6] 1RH + R + Rl6 + R17 {I,: + [51 【 6] fR1. + Rl5 + R1RI7 Zhao l = +, R14 + RIj + RM + RlT one of the resistor value can be arbitrary , so you can complete all of the circuit design. Sigh over the program in Figure 1, a concrete realization. There are many circuits can also be formed , not one by one discussed in this article . |
|
