Recent content by studentLab

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    CKP sensor design with comperator

    I try to build this circuit when simulator give most equal to real signal. Not an assignment. I have one Honda OBD1 P30-900 EG9 ecu that have problem with the module that convert CKP sensor signal to main processor. Mostly people just change new ecu or swap the module with another damage ecu...
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    CKP sensor design with comperator

    Inject a sinusoidal signal instead of the sensor and at the output of the hydrid module in Honda OBD1 must have a rectangular signal of the same frequency than input. Crank sensor signal = +/- 250mV sinus wave Crank signal after trigger in the module = 5v square wave So inject +/- 250mV sinus...
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    CKP sensor design with comperator

    Here my new circuit, simulator give almost near.. Add Rd resistor and change polarity, look like same but diffrent output value. Circuit here:
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    CKP sensor design with comperator

    Hello, i try to duplicate crank position sensor signal. Here my LM301A circuit with multisim 13 simulator. Need advise to get similar to real signal. Real signal get. It is possible to re duplicated the signal condition.?
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    n-channel MOSFET common source amplifier

    Vgs = ( Rin / Rin + 0 ) x Vin Vgs = ( 20.04k / 20.04k + 0 ) x 45mV Vgs = 45mV Vin = Vgs Vin = 45mV Vout = −gmVgs(ro || RD) Vout = -6mS x 45mV ( 78.9k x 3.3k / 78.9 + 3.3k ) Vout = -6mS x 45mV ( 3.17k ) Vout = -0.856V Ac output gain = Av = Vout / Vin Av = -0.856V / 45mV Av =...
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    n-channel MOSFET common source amplifier

    Hello and good day for all, I need advice in finding Vout and ac voltage gain in n-channel MOSFET common source amplifier. Here i get : Since the source is grounded, the gate-to-source voltage is VGS = (R2 / (R1 + R2)) x Vdd VGS = (33k / (51k + 33k)) x 15 VGS = 5.893V ID = k [ VGS –...
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    AC Analysis common emitter configuration

    Thank you steve and LvW, it help me to understand better in this Av calculation. Only 2 month start studying Analog Measurement subject.
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    AC Analysis common emitter configuration

    Im confuse there diffrent formula to get Av: Av = Vc / Vb Av = Vout / Vin Av = Rc / Re In my DC analysis calculation: VB1 = 2.16v VC1 = 7.43v VE1 = 1.46v If i use Av1 = VC1/VB1 = 7.43v / 2.16v = 3.44 Av2 = Av1 since VB1, VC1 = VB2, VC2. Av2 = 3.44 So in AC analysis i must use Av...
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    AC Analysis common emitter configuration

    Thank you duke37, it help me understand how to find voltage gain. But why simulator give 6.++ instead 8 for Av1?
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    AC Analysis common emitter configuration

    YEs im sorry my bad, it parallel. I fix the equation following LvW, and i get nearly same with simulator. * ICq1 = IEq1 IEq1 = Vb1 - Vbe1 / R4 + R5 = 2.16 - 0.7 / 1k + 0.150k = 1.27mA * r'e get from r'e = Vt / ICq1 = 26mV / 1.27mA = 20.47 ohm. Av1 =( R3||R6||/R7|| Beta(r'e +R4) ) / r'e+R4...
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    AC Analysis common emitter configuration

    Hello and great day for all. Im asking for advice in this circuit. How to calculated Av for ac analysis in correct way. Av1 =( R3//R6//R7// Beta(re +R9) ) / re+R9 Av2 = R8//R9 / re +R9 Using that formula i cannot get same with multisim simulator for Av1 and Av2
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