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63 Threads found on edaboard.com: Internal Capacitance
Ah, so that's why low-capacitance cables are advised for interconnects. No. A product must never oscillate when it uses normal high capacitance cables so they have resistors to stop the oscillation. but the high capacitance and resistors cause high frequency rolloff if connecting cables are long. Use low capacitance cabl
Hi, If you have for example a multi layer board, usually you can apply between two layers (GND & some supply voltages)a very thin internal layer (basic material of for ex.) 100um thickness, and calculate as a normal capacitor with plate surface of Xcm x Ycm & distance (thickness of dielectricum) 100umeter... Epsilon-rel is of FR4 (typical_hell b
When Lee de Forest invented the “Audion” triode in 1908 the maximum frequencies used for radio communications were medium waves, not even short waves. The parasitic internal capacitance's in audio tubes are much lower than internal capacitance's of audio power BJTs. Audio pentodes which have much lower (...)
Hi This is more beyond a simple question. It is a two-folded research item. 1. Power dissipation caused by mos scaling 2. Data or clock synchronization 1. Power = Dynamic + Static + Short Circuit Dynamic power ~ VDD^2 VDD is reduced with scaling Load equivalent capacitance related to MOS internal capacitances in turn (...)
I totally agree with Berni80. He cleverly indicated two different usage term of active miller clamp. In drivers the problem is current itself due to miller capacitance. Resulted voltage drop on gate resistance can be turning on the IGBT, when it reaches to certain level (depends on IGBT). 332J has internal dedicated active circuitry with low im
I need to design a wideband opamp with the specifications: f(-3dB)>150MHz for my Master's project. I tried finding the internal circuitry of many chips online but couldnt find any. Specifically,I would need the internal circuitry with the resistance and capacitance values of OPA634. Could anybody give me any info either on the above (...)
The optocouplers BJT differs from a standard BJT that the area is much bigger to receive more infrared light and the base depth is much bigger to absorb a big part of the infrared. That has two consequences. 1. The internal Ccb is high. 2. The base transit time is high If the collector current is not driven into low ohmic virtual ground th
Slew rate is dependent on the current available at an internal stage to charge and discharge a capacitance. It will set the large signal frequency response.
TSPC is a dynamic latch, which means that it keeps previous state by storing voltage level as charges on an internal node capacitance. These charges leak with time. This places a limit on the lower frequency of the TSPC latches. I think you'd better use a static latch instead as static latches rely on positive feedback to keep previous state.
Usually the 40MHz clock for 18F series PIC comes from a 10MHz crystal and activating the internal PLL that multiplies the 10MHz by 4. Check the datasheet to be sure.
Here is my Circuit and JavaScript Calculator that I designed to determine the Interwire capacitance of coils. Hopefully it is useful to some of you. This might be good to have as a "Sticky", but I don't see how to do that. Have Fun....Gary
Dear dude, Decoupling capacitance is used to remove the ground bounce , which is induced due to I/0 buffers affecting the internal circuit. Hope u know how ground bounce occurs , i have assumed as u know so only i have given the direct answer. Santu
Load capacitance - ussualy defined as max. load capacitance - is maximal capacitance, which can be driven by the pin(concerned with max pulse current of the pin). Input and output capacitances - internal IC capacitances, this affects operation speed.
Hi I look for 27 Mhz crystal parameters like Cs(sereis internal capacitance) and Ls(sereis internal inductance) and Cp(parallel cap..) plz help me tnx
You should read AN192 and AN193 application notes from Philips. But as a simple approx. calculation you can consider LC tank composed from L and surrounding capacitors (4.7p, 18p and a trimmer 22p in the mid range) together with internal varicap capacitance. IF frequency is low, about 75kHz so you can assume that oscillator frequency is the same as
hi all,, in Tom lee book..mentioned that in a cascode device if the device width is large enough then parasitic source capacitance for a large device width will increase the amplification of the cascoding devicec own internal noise at high frequencies.....i am not sure HOW it is...can anyone explain ? please...........
Hi all, I need some reference about the ability of LED switch on-of?...How max frequency of Pulse Width Modulation that can be apply to LED? Thanks Regards Harish Quite high frequency - internal capacitance on chip, inductance on pin out and impedance on current source is big factor to how fast diode can turn down an
Hi, The reason for this is that a capacitor also has some (how small) inductance (leads and internal connections to the plates. This makes the capacitor getting a smaller and smaller value until you get to the resonace point. This is the point at which the induction of the capacitor are the same as the capacitors value XC = XL (XC= 1/(2*PI*f*C) ) X
Not sure which compiler you are using, but I know the 628 also has an internal osc, and the following may or may not, be relevant: ER_IO External resistor osc INTRC_IO internal RC Osc, no CLKOUT ER External resistor osc, with CLKOUT INTRC internal RC Osc Also the two previous posters offer some good advice. If your delay is only 500 (...)
My guess would be the large miller and output capacitances present with the 2N3055 power transistors. As soon as you turn on the one device, the falling transition on the collector is coupled through the C-B capacitance of the other device, causing the negative spike on that base. Try using small signal transistors with much lower internal (...)