Search Engine

234 Threads found on Source Sink
I understand that we use an NMOS to form a constant current source. My question is, can we create a constant current sink using a similar approach with PMOS? Is constant current sink even a thing? Constant Current source is a term used in the circuit theory (analysis/synthesis), as a construct to
The load impedance is 20Kohms (10K+10K to 7.5V) and this may be too low for your bias current, with that bare current source/sink mirror output. Test this possibility by vcvs-buffering the output node before the feedback is taken.
Hi, The given audio amplifiers ... (without any signal connections) will output VCC/2. If your supply voltage is 5V then the output is 2.5V. They are able to easily sink and source currents of 100mA. I thought this is what you need. This is a simple - one part - solution. *** But you have an OPAMP with additional bias. With the
It depends on the loudspeaker and how much power you want. Some NE555 manufacturers specify as much as 200mA sink/source current which is enough to drive a medium to high impedance loudspeaker directly. The mass of the loudspeaker cone will be enough to average the PWM back to an analog level. For higher power all you need to do is ensure enough '
A output ESD block may change the output impedance while it's driven by a source or sink.
A common source amplifier is always inverting, no matter whether it's NMOS or PMOS or what the load is.
Another drawback is that unless you can find an opto-coupler with fast switching characteristics and high current source and sink capability, it will not be able to provide enough gate current to ensure rapid turn on and off of the MOSFETS. The relatively high gate capacitance of power MOSFETS means you need a large charging current to turn them o
If you add 0.6V to your input, then you get 1V output from the classic NPN emitter follower. It automatically subtracts .6V. Notice the bias sinks as much as 160 uA. If this is not too much for your bias to sink or source, then it may also be all right if the supply goes as low as 1.1 V.
I seek to model an array of copper vias embedded in a doped silicon wafer of conductivity 10^4 S/m in Q3D Extractor. With this level of conduction in the substrate what is the appropriate way to model this element? Should a source and sink be applied to the silicon and if so where? It would seem adding a source and sink to (...)
I have a source current Iref, how can I get a matched sink current Iref from it? The famous change pump using a op-amp to bias the other side of the current source to make pmos and nmos current to be matched, however it needs an extra op-amp. Is there any other simple way to implement it? Thanks.
I presume the TLP cathodes are directly connecting to STM32 IO pins? STM32 GPIOs can basically source or sink the required TLP drive current. But the circuit is completely wrong. - individual series resistors for each optocoupler required, power supply must be 3.3V - high side drivers can't use common power supply, need either three DC/DC con
Whats the better way to connect LEDs to MCU (microcontroller) pins 1. MCU Pin to Anode of LED (source Current) 2. MCU Pin to cathode of LED (sink Current) I have had some issues when sourcing current (option 1). after continuous usage, the pin of MCU was damaged.
Hi, I have read the article on current mirror and understood that current mirror using PMOS can be used as current source and current mirror using NMOS can be used as a current sink. I am not sure, where can I use current sink current mirror and where current source current mirror in the circuit. Could you please (...)
Pmos/Nmos current mirror can be used to amplify the source/sink current. 130489 If the input current direction can be both directions, what kind of current mirror can be used to amplify the input current? Thanks.
High impedance doesn't mean the drain can't carry significant current, it means that, in the saturation (active) region the current does not vary much with a change in drain voltage. In that region the current is largely determined by the gate-source voltage. In other words the drain tends to look like a current source (sink).
Hi, All this depends on your circuit. You should give at least your example circuit. * Supply voltage? * output current? source only? or sink too? gain: How much gain do you need? What is the input voltage? I estimate it should be a unity gain buffer, am I right? BW: For me a reference voltage could be considered to be DC. Now it depends on the
To know the inverter power (magnitude and direction), you'll multiply and voltage and current (instantaneous power) and average the product. Under circumstances, it's sufficient to form sign(P) = sign(V) xor sign (I), needs only two comparators. The inverter can also "source" or "sink" reactive power, in this case sign (P) will flicker with doub
The datasheet of most Mosfets shows it conducting a high current when Vgs is high and conducting a low current when Vgs is low. But each Mosfet is a little different and the resistance between drain and source is affected by the temperature and by the Vds. It becomes a current source or sink.
It can sink more than source. 10 vs 3mA Hence "Minimum pull-up resistor of 500 Ω, from VCC to VIOUT | "RL VIOUT to GND 4.7 kΩ" (min) typical bipolar (BJT) specs are asymmetric.
Are you asking if you need something between the power supply and the motor? If it's a 12VDC motor you can safely apply the 12V power supply across it. If by ignore the transistor and resistor you mean you don't plan to use them then that would be an issue. The Arduino pins cannot source or sink anywhere near 950mA. If you