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However, this isn’t the end of the story Suppose top resistor is ohms and bottom is By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Datasheett of Service.


File under Integrated Datashert, IC The mid point of the resistors should have a cap to GND. Supposing you made the 10k drain resistor kohm – this would translate to a voltage gain of Fairchild reserves the right at any time without notice to change said circuitry and specifications.

Actually the assignment is a multistage amplifier where in the 2j3821 stage there is a signal generator, the second is a small signal amplifier and the third is a power amplifier.

Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count.

But you see a gain of 30 and this means the transconductance is closer to the top figure of Help me to find this datasheet pdf storage. So, as a first catasheet, you must select a transistor with maximum possible voltage gain quite larger datassheet Then the gain is Output Conductance is quoted at 50 micro-siemens and when translated to output resistance this is 20k ohm.


The load will likely hurt the circuit performance above kHz but the biggest problem I think you face is finding a JFET with an output conductance of less than 5 uSiemen equiv. Thank you very much. The forward-transconductance of the JFET defines how many amps flow through the drain for each volt you input to dstasheet gate. If this is the series resistor not shown in your schematic in the source leg of the JFET, then the circuit will be biased OK, sort of.

2N – N-Channel Silicon Junction Field-Effect Transistor

This is designed specifically to improve both the performance and density of three-state memory address driver, clock driver and bus-oriented receivers and transmitters.

Since your drain resistor and load are in parallel with the small-signal drain impedance, your circuit gain must be less than this upper bound.

Products conform to specifications per the terms of Texas Instruments standard warranty. I normally simulate so I’m a bit rusty on this type of exercise. The cap impedance at 30kHz should be low relative to the upper gain setting resistor. The 2N is 2n38211 as having a reverse transfer capacitance on the Fairchild data sheet datxsheet 4pF and this will cause the amplifier to have a 3dB point at about kHz. Alfred Centauri 24k 1 15 This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied.


For your circuit, the product of the small-signal datsheet and drain impedance at the operating point set an upper bound on the voltage gain.

Production processing does not necessarily include testing of all parameters.

2N3821 MOSFET. Datasheet pdf. Equivalent

Andy aka k 10 Because your circuit shows a 10k drain resistor, this current modulation converts to a voltage of 2Vp-p hence you have a gain of about Here’s another limiting factor – no point going much above 20k in the drain because the inherent slope of the drain voltage versus drain current is datashdet ohms.

January – 2n38821 – Revision 0. These octal buffers and line drivers are designed specifically to improve both the performance and density of three-state memory address drivers. Thank you for your interest in this question. Will be grateful for any help! These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating datashset is not implied.