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When inductor is disconnected from supply a huge negavive pulse is developed across with very sharp rising edge.
But does the same happen when disconnecting transformer?
I tried this, the voltage pulse is developed but rising edge is more flat. Is it ok or i am doing something wrong?
I am not sure how to connect the weighted resistors. But I have an idea to enable 4 current sources (1,2,4,8mA) by these open-collectors and supply some resistor. It should be pretty linear, isn’t it?
Thx, 4bit resolution (16 levels). 5% accuracy is enough. It’s just for generating a waveform close to sine-wave as a reference for pwm to drive small motor.
Hi, is there some option to make DAC from just open-collector outputs? A common R2R ladder is probably not possible since it is not able to supply a full current through collector resistor.
Thx Stenzer, I am not a phd student now. I was a 10y ago for a 2y but I didn’t finish because I had some health trouble. Also I am not an IEEE member.
I am looking for publishing in two areas:
Analog design (about improving op-amps) and Power Electronic (improving magnetic and also design of...
Hi, I am trying to find out how to get my research paper on some el. conference to be published. All conferences I found have a registration fees about 1000 Eur. I’d like to ask if it is common or I am just unlucky. This fees are too high according my opinion. If that’s common the research is...
Thx,
-regarding to R4 = 160k, i need a time response to 100ms (i didnt mention :)), R4 must be lower
-regarding to R5 and R7, i need better output impedance , R5 = 2K2 is maximum alowable resistance, 4 comparators connected directly to collector will destroy the output voltage.
-i must put a...
Thx, of course, I will not to try to do a impossible things.
I cannot increase a supply voltage, but i can change the output range (i choosed +1 to +7V very raw).
The condition is to make the output as wide as possible to prepare hight resolution for next circuits like comparator.
Can u pls...
Ok,
this is the schematic:
its an serial RLC circuit fed by square wave. I measure the amplitude of R1 voltage (the maximal value). So i rectify it using diode D1 (it will cut the negative part of voltage) and filter it by capatitor C2.
Please dont take the waveform diagram accurate, its...
Hi, thx,
-input is from +1 to +2 volts
-output is from +1 to +7 volts
-i need only the inverse signal
-the function should be linear, I am using C1518 gr3k transistor, seems its Hfe is constant.
I am asking about if the biasing is needed, if i have enough input voltage to drive Bjt directly...
Hello,
I need to scale a DC voltage from range <1 - 2V> to range <1 - 7V>. I can use a single transistor amplifier circiut, becouse I need also inverse this signal.
But what I am interested is if have enough voltage level on input (more than 0.7) if is an R17 need, another words, if I can use...
Its not homework, I am bit older.
I m trying to do it like fig. below, so the 1st Dflop can become lock, and i need to open it in every second clock by 2nd Dflop. Of course it isnt working, I need to help with this. It probably would be neede to sense a negative clock pulse also and make the...
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