Author Topic: Transimpedance BJT Amplifier Design  (Read 331 times)

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Offline JakubTrybekTopic starter

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Transimpedance BJT Amplifier Design
« on: November 07, 2024, 01:16:15 pm »
Hi all, i have been tasked to design a Transimpedance amplifier using BJT'S, In this case a CE - CC stage amplifier. I have shown the circuit and H parameter below,
Im struggling in the derivation of the gain which is needed to verify my multisim results. If anyone could give any support i would greatly appreciate it.

I am particularly struggling with including the Feedback resistor, the value has been calculated in order to suit my bandwidth of 1Mhz.

 

Offline Marco

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Re: Transimpedance BJT Amplifier Design
« Reply #1 on: November 07, 2024, 04:33:21 pm »
If it's a little lower than 50k I'd just believe the sim and move on :p
 

Online TimFox

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Re: Transimpedance BJT Amplifier Design
« Reply #2 on: November 07, 2024, 05:13:54 pm »
The circuit for the CC output stage doesn’t look right:  the input impedance will be higher than that of the CE input stage, but you have them both at hie.
I would start with transistor models based on transconductance, rather than current gain.
 

Offline youngda9

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Re: Transimpedance BJT Amplifier Design
« Reply #3 on: November 07, 2024, 06:40:31 pm »
Is this the place for college kids to come get help with their homework now?   :-DD
 


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