MullOverThing

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# How do you measure output impedance in Cadence?

## How do you measure output impedance in Cadence?

Z=V/I ; I =1A , so you get directly the output impedance vs. frequency.

What is the unit of output impedance?

13.70 Output Impedance Parameter, Z The output impedance parameter, Zo, is defined as the frequency dependent small signal impedance that is placed in series with an ideal amplifier and the output terminal in a closed loop configuration. The value of Zo is expressed in units of ohms.

### What does a high impedance meter measure?

Meters with a high input impedance draw almost no current through the meter while testing a circuit. Multimeters have high input impedance (you can measure low voltage on logic circuits). Meters with a low input impedance draw a small amount of current through the meter while putting a small load on the circuit.

How to measure the output impedance of a CMOS inverter?

That’s no good! Then do an AC analysis over frequency. As Zout = Vout/Itest and Itest = 1 (due to AC magnitude = 1 of Itest) You can just plot the magnitude of V (out) and that will be the output impedance. Thanks for contributing an answer to Electrical Engineering Stack Exchange!

#### What is the capacitance of a CMOS gate?

The input impedance, in either state, of CMOS gates is typically on the order of 10 12 Ω. The input capacitance is on the order of 10 pF. The output impedance depends on the particular device and is on the order of 5 kΩ for either state. CMOS devices have relatively long propagation delays to their high output impedance.

What is the typical power dissipation of a CMOS IC?

The typical quiescent (static) power dissipation (power dissipation of a device that is not changing logic states) of CMOS ICs operating at 5 V are on the order of 50 nW at room temperature. However, as the frequency of switching increases, dynamic power dissipation becomes important.

## How to plot gate voltage transfer curve in CMOS?

Connect the inverter output V out to the Channel 2 input and V in to the Channel 1 input of the scope. You want to plot Channel 1 vs. Channel 2, so the scope must be in XY mode. The resulting plot of V out vs. V in is the gate voltage transfer curve.