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79 Threads found on edaboard.com: Charge Injection
The voltage step effect is known as "charge injection" through gate capacitance and will be observed with any real analog switch. The effect is considerably lower for CMOS switches where NMOS and PMOS transistors are controlled by complementary gate voltages so that the injected charges cancel mostly. An additional positive voltage step (...)
How does those two affect the circuit? what kinds of effects we will see in circuit?
The size will fall out of optimization for whatever it is that you care about. We do not know what that is. Maybe you care about propagation delay, or not. Maybe you care about clock feedthrough or charge injection. Maybe you only care about minimum layout area. Transistors have properties, you fiddle them around until you understand, then unt
Its a semiconductor process failure mechanism the material is super heated in a plasma gas environment with charge injection. THere is one condition that results in a process failure that is counter-intuitive where the large area floating conductors discharge with less current injected rather than more. Hence "reverse" antenna effect. http:/
Perhaps charge injection from the switch. Can you afford higher load capacitance? Try if this helps. Or try compensation: Use the 2nd switch inversely controlled , i.e. open it when the other one closes and vice versa. Input to GND (perhaps via 100kΩ, too), output connected to LOUT.
I read the book from Maloberti, which says that: "A charge injection into a low-impedance node will only cause a glitch whose duration depends on the value of the node impedance. However, a charge injection into a high impedance or capacitive node causes an offset that can be problematic, especially when the injected (...)
Please explain charge injection in switch
It is possible but it requires careful design to minimize the charge injection from the CMOS gates into the signal path.
you are using a voltage source with most likely a 1fs rise/fall time, then yes you get those very large glitches, this is clock feed though and charge injection of turning on and off your switches. Never had your switches being switched by a voltage source, put a real inverter in there so it will be driven with something realistic. Also never use
Hi,there! As we know and can be seen from the pic below, the bottom plate sample technique is widely used in S/H to reduce charge injection from sampling switch. The sampling instant is said to be determined by the CLK Φ1p which is opened in advance with respect to Φ1 in many literatures. Recently, however, an engineer told me that in fa
I am not sure that your simulation circuit is correct, the signal source needs an internal impedance and must be AC coupled to the clamp, so the charge on the coupling cap carries the clamping voltage through to the next clamp pulse. Frank
i saw that sort of topology(switch between two current mirror). Should have been different somehow to work. There are various way to short Vgs, I don't see a particular preference. Spikes created by charge injection seems to be a problem anyway.
Please don't give me the 2 transistor analogy, I want to know the physicists viewpoint on this.... Sounds like, "I can't understand how a transistor works, now I want to understand SCR". That's helpless, because the charge carrier injection mechanism is effectively the same. After understanding it in case of a transistor, you should
hi all, I want to change the charge injection parameter "xpart" in the cadence 5.14..Can somebody tell me how to do it & where do i find the BSIM file in cadence to change the xpart from 0.5 to1??..Kindly help me
You can find good schematics in older databooks from Harris Semiconductor, Intersil (back when the two were distinct), Data General, even RCA CD4000 logic. You need a demux and a rack of switches. But then come the niceties like break-before-make (so as not to cross-contaminate sample voltages), charge injection (ditto), tradeoffs in on resistance
maxim also has 16 channels decoder via spi ... MAX14802, MAX14803, MAX14803A Low-charge-injection, 16-Channel, High-Voltage Analog Switches - Overview
Hi, Can any body let me know how to do charge injection efficiency simulation of Pixel ? Please, share with me your information Thank You.
Hi, how to suppress charge injection effect in sample hold circuit ?
charge-incjection can be change to a constant offset for proper structure and timing.
If you can afford it, route clk & clk_b in parallel. So the influence on crossing sensitive signal lines (charge injection during clock edges) can be compensated (not totally, but to a good part). And you always have both phases available ;-) .