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Though I'm not expert in your topology I've observed many threads at Edaboard about similar circuits. A forum search of your keywords should lead to previous discussions.
Sometimes your input signal is genuine bipolar AC, centered around 0V and possibly weak (uV or mv). It makes sense to continue this AC mode throughout your op amp (or collection of current mirrors and current sources). That way you can use your input signal unaltered and close to 0V. The...
Replies above are helpful...
My experience: More than once I've hooked up a hardware 555 to output a pulse train. At first I could not see any 'idle' time until I fiddled with oscilloscope settings to focus on that part of the waveform. It's like the duty cycle was 99.9%.
I believe it has to...
Now I see your plan is to create opposite polarity of incoming supply. I find I can try to hook up mosfets that conduct via auto-bias, however the body diode conducts at the wrong point in the cycle (reducing output amplitude), or else the mosfet must rely on the body diode to conduct at the...
In simulation this particular topology (flying capacitor) has lent itself to auto-biasing, where transistors derive their bias not from a clock signal but from the circuit itself. At each position I must test an N-device and a P-device, then see if the node above or below provides sufficient...
Consider what you wish to build is similar to the old-fashioned 'crystal' radio set. Needs no power to run. Takes its power out of the air from radio broadcast waves. Your aim is to gain maximum strength of voltage and current, whatever techniques you might find to use. Often it's a long...
This digital method yields unchanging amplitude. By putting proper weighted resistors on a shift register it produces quasi-sine shape. The clock must be several times the frequency you desire. The clock can be square waves from a VCO in a 4046 IC (or whatever you choose). A smoothing capacitor...
Link describing the Sulzer oscillator. It can be tuned over a wide range of frequencies, while keeping its sine shape and amplitude.
www.allaboutcircuits.com/technical-articles/oscillator-circuit-never-heard-of-the-sulzer-network/
As mentioned there is a formula to calculate capacitive reactance (capacitive impedance):
Xc= 1/ (2 π F C)
Thus the .68 uF value presents 4700 ohms impedance at the moment it conducts. It conducts at the 330V peaks. It lets through 70mA (330/4700). As the circuit runs this is averaged to a...
In the back of my mind the topic seems to be a railgun, coilgun... Or could benefit from techniques used in building such devices. I understand enormous banks of capacitors are required to supply the brief power surge.
A diode alter's its internal impedance depending on applied voltage and current. The result obeys a formula which can be approximated as:
A=(V x 1.25) ^ 21.
So when it's conducting 1A, expect it to read 0.8V. I took several readings of a silicon diode, how much voltage causes so much current...
Impedance matching is supposed to maximize power throughput. Incoming voltage & current may be at levels not usable by your following circuitry. Therefore the aim (when harvesting RF energy) is usually to raise volt amplitude even though it means current must be reduced in the same fashion. By...
Your schematic is a self-oscillating boost converter. It might do the job although it is likely to be unstable (erratic as in working or not woking). The load makes a big difference as to whether it operates properly. Notice that a boost converter with no load might rise to alarmingly high volt...
Seeing this thread has a pause I'll step in and mention a lossless snubber which I saw somewhere among electronic-related websites. The schematic said it's for SEPIC converters but I see articles discussing it for other types of switched-coil converters.
In essence the diode (located on the...
I'm looking at the schematic in post #40. The LC delay ladder. No matter how carefully you craft the applied pulse wave, it gets distorted as it carries through the ladder network. Its rectangular appearance is barely recognizable by the time it reaches the output.
The LC ladder imposes its own...
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