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Questions tagged [cascode]

Anything related to cascode amplifier circuits. A cascode (not to be confounded with cascade) circuit is a two-stage direct-coupling amplifier topology using two amplifying elements (usually two BJTs or two FETs).

Anything related to cascode amplifier circuits.

A cascode (not to be confounded with cascade) circuit is a two-stage direct-coupling amplifier topology using two amplifying elements (usually two BJTs or two FETs).

See also Wikipedia on cascode configuration.

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When do you want an ESBT (emitter switched bipolar transistor)?

I just found out about ESBTs, which seem to be a hybrid of BJT and MOSFET: When I googled it most links led to STMicroelectronics, so I think currently they're the only manufacturer. I noticed that many devices are high voltage (1000V to more…
stevenvh
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Current mirror and double cascode

I was asked to determine the input resistance of the circuit in the figure, with and without channel effect. Is there a formula for that which could be applied or must I draw the small signal scheme and find it more rigorously?
peripatein
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Question about cascode amplifier problem

The Rout in the circuit below is stated by my textbook to be Rout = [1 + gm2(r01||rπ2)]r02 + r01. However, I thought the equation for Rout was Rout = [1 + gm2(r01||rπ2)]r02 + (r01||rπ2) for a cascode amplifier. What happened to the rπ2 in parallel…
Jimmy Vailer
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Output Resistance of this circuit - Cascode

Please see images of question, my working out and the correct solution. I seem to be incorrect for some reason. This is without resorting to the small-signal model.
Arsenal123
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Cascode Datasheet Capacitances

Cascode devices used in power systems are assigned values for Ciss, Coss and Crss in the datasheet, for example the UF3C120150K4S ( https://unitedsic.com/datasheets/DS_UF3C120150K4S.pdf ) What does this mean in terms of the capacitances of the low…
scouseydaniel
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Determining Io/Iref

I'm asked to find the ratio \$I_o/I_{ref}\$ in the attachment which follows. Normally, due to the current mirror, I'd claim that the ratio should be 1. However, as it's also given in this section that \$V_o=3V_{GS}\$ and that \$\lambda\$ is given, I…
peripatein
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