Drain Resistance in Cascode Amplifier Solution

STEP 0: Pre-Calculation Summary
Formula Used
Drain Resistance = 1/(1/Finite Input Resistance+1/Resistance)
Rd = 1/(1/Rin+1/Rt)
This formula uses 3 Variables
Variables Used
Drain Resistance - (Measured in Ohm) - Drain resistance is the ratio of change in drain to source voltage to corresponding change in drain current for a constant gate to source voltage.
Finite Input Resistance - (Measured in Ohm) - Finite input resistance is the finite resistance seen by the current source or voltage source which drives the circuit.
Resistance - (Measured in Ohm) - Resistance is a measure of the opposition to current flow in an electrical circuit. Its S.I unit is ohm.
STEP 1: Convert Input(s) to Base Unit
Finite Input Resistance: 0.78 Kilohm --> 780 Ohm (Check conversion here)
Resistance: 0.48 Kilohm --> 480 Ohm (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Rd = 1/(1/Rin+1/Rt) --> 1/(1/780+1/480)
Evaluating ... ...
Rd = 297.142857142857
STEP 3: Convert Result to Output's Unit
297.142857142857 Ohm -->0.297142857142857 Kilohm (Check conversion here)
FINAL ANSWER
0.297142857142857 0.297143 Kilohm <-- Drain Resistance
(Calculation completed in 00.020 seconds)

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5 Response of Cascode Amplifier Calculators

Gain Bandwidth Product
Go Gain Bandwidth Product = (Transconductance*Load Resistance)/(2*pi*Load Resistance*(Capacitance+Gate to Drain Capacitance))
3-DB Frequency in Design Insight and Trade-Off
Go 3 dB Frequency = 1/(2*pi*(Capacitance+Gate to Drain Capacitance)*(1/(1/Load Resistance+1/Output Resistance)))
Drain Resistance in Cascode Amplifier
Go Drain Resistance = 1/(1/Finite Input Resistance+1/Resistance)
Amplifier Gain given Function of Complex Frequency Variable
Go Amplifier Gain in Mid Band = Mid Band Gain*Gain Factor
Gain Factor
Go Gain Factor = Amplifier Gain in Mid Band/Mid Band Gain

20 Multi Stage Amplifiers Calculators

Constant 2 of Source Follower Transfer Function
Go Constant B = (((Gate to Source Capacitance+Gate to Drain Capacitance)*Capacitance+(Gate to Source Capacitance+Gate to Source Capacitance))/(Transconductance*Load Resistance+1))*Signal Resistance*Load Resistance
Gain Bandwidth Product
Go Gain Bandwidth Product = (Transconductance*Load Resistance)/(2*pi*Load Resistance*(Capacitance+Gate to Drain Capacitance))
3-DB Frequency in Design Insight and Trade-Off
Go 3 dB Frequency = 1/(2*pi*(Capacitance+Gate to Drain Capacitance)*(1/(1/Load Resistance+1/Output Resistance)))
Transconductance of CC-CB Amplifier
Go Transconductance = (2*Voltage Gain)/((Resistance/(Resistance+Signal Resistance))*Load Resistance)
Overall Voltage Gain of CC CB Amplifier
Go Voltage Gain = 1/2*(Resistance/(Resistance+Signal Resistance))*Load Resistance*Transconductance
Signal Voltage in High Frequency Response of Source and Emitter Follower
Go Output Voltage = (Electric Current*Signal Resistance)+Gate to Source Voltage+Threshold Voltage
Input Resistance of CC CB Amplifier
Go Resistance = (Common Emitter Current Gain+1)*(Emitter Resistance+Resistance of Secondary Winding in Primary)
Total Capacitance of CB-CG Amplifier
Go Capacitance = 1/(2*pi*Load Resistance*Output Pole Frequency)
Dominant Pole Frequency of Differential Amplifier
Go Pole Frequency = 1/(2*pi*Capacitance*Output Resistance)
Frequency of Differential Amplifier given Load Resistance
Go Frequency = 1/(2*pi*Load Resistance*Capacitance)
Short Circuit Transconductance of Differential Amplifier
Go Short Circuit Transconductance = Output Current/Differential Input Signal
Transition Frequency of Source-Follower Transfer Function
Go Transition Frequency = Transconductance/Gate to Source Capacitance
Gate to Source Capacitance of Source Follower
Go Gate to Source Capacitance = Transconductance/Transition Frequency
Transconductance of Source-Follower
Go Transconductance = Transition Frequency*Gate to Source Capacitance
Drain Resistance in Cascode Amplifier
Go Drain Resistance = 1/(1/Finite Input Resistance+1/Resistance)
Amplifier Gain given Function of Complex Frequency Variable
Go Amplifier Gain in Mid Band = Mid Band Gain*Gain Factor
Gain Factor
Go Gain Factor = Amplifier Gain in Mid Band/Mid Band Gain
Dominant Pole-Frequency of Source-Follower
Go Frequency of Dominant Pole = 1/(2*pi*Constant B)
Power Gain of Amplifier given Voltage Gain and Current Gain
Go Power Gain = Voltage Gain*Current Gain
Break Frequency of Source Follower
Go Break Frequency = 1/sqrt(Constant C)

Drain Resistance in Cascode Amplifier Formula

Drain Resistance = 1/(1/Finite Input Resistance+1/Resistance)
Rd = 1/(1/Rin+1/Rt)

What is the difference between Cascade and cascode amplifier?

In a cascade amplifier, the transistors are arranged like a chain that is the output of the first transistor is connected as input for the second transistor. While in a cascode amplifier, the transistor is placed one above the other.

How to Calculate Drain Resistance in Cascode Amplifier?

Drain Resistance in Cascode Amplifier calculator uses Drain Resistance = 1/(1/Finite Input Resistance+1/Resistance) to calculate the Drain Resistance, The Drain resistance in cascode amplifier formula is defined as ratio of change in drain to source voltage to corresponding change in drain current for constant gate to source voltage. Drain Resistance is denoted by Rd symbol.

How to calculate Drain Resistance in Cascode Amplifier using this online calculator? To use this online calculator for Drain Resistance in Cascode Amplifier, enter Finite Input Resistance (Rin) & Resistance (Rt) and hit the calculate button. Here is how the Drain Resistance in Cascode Amplifier calculation can be explained with given input values -> 0.000297 = 1/(1/780+1/480).

FAQ

What is Drain Resistance in Cascode Amplifier?
The Drain resistance in cascode amplifier formula is defined as ratio of change in drain to source voltage to corresponding change in drain current for constant gate to source voltage and is represented as Rd = 1/(1/Rin+1/Rt) or Drain Resistance = 1/(1/Finite Input Resistance+1/Resistance). Finite input resistance is the finite resistance seen by the current source or voltage source which drives the circuit & Resistance is a measure of the opposition to current flow in an electrical circuit. Its S.I unit is ohm.
How to calculate Drain Resistance in Cascode Amplifier?
The Drain resistance in cascode amplifier formula is defined as ratio of change in drain to source voltage to corresponding change in drain current for constant gate to source voltage is calculated using Drain Resistance = 1/(1/Finite Input Resistance+1/Resistance). To calculate Drain Resistance in Cascode Amplifier, you need Finite Input Resistance (Rin) & Resistance (Rt). With our tool, you need to enter the respective value for Finite Input Resistance & Resistance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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