![a Measured small-signal current gain ( H 21 ) and Maximum Available... | Download Scientific Diagram a Measured small-signal current gain ( H 21 ) and Maximum Available... | Download Scientific Diagram](https://www.researchgate.net/publication/359683439/figure/fig2/AS:11431281096305794@1668106587953/a-Measured-small-signal-current-gain-H-21-and-Maximum-Available-Power-Gain-MAG-of.png)
a Measured small-signal current gain ( H 21 ) and Maximum Available... | Download Scientific Diagram
![analog - BJT small signal analysis, ignoring current sources - Electrical Engineering Stack Exchange analog - BJT small signal analysis, ignoring current sources - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/amXl7.png)
analog - BJT small signal analysis, ignoring current sources - Electrical Engineering Stack Exchange
![I know that when I draw the small-signal , the gain will be zero, but I can't understand what is the concept behind when the current didn't change so the gain is I know that when I draw the small-signal , the gain will be zero, but I can't understand what is the concept behind when the current didn't change so the gain is](https://preview.redd.it/i-know-that-when-i-draw-the-small-signal-the-gain-will-be-v0-u6urtvw0p7mc1.png?auto=webp&s=bfc9b031417cf81754e9e4313ec5fbb92f1e785f)
I know that when I draw the small-signal , the gain will be zero, but I can't understand what is the concept behind when the current didn't change so the gain is
![Small-Signal Parameters of Bipolar Transistors: Transconductance, Gain, Input and Output Impedance - YouTube Small-Signal Parameters of Bipolar Transistors: Transconductance, Gain, Input and Output Impedance - YouTube](https://i.ytimg.com/vi/yrQgpqMTNfQ/maxresdefault.jpg)
Small-Signal Parameters of Bipolar Transistors: Transconductance, Gain, Input and Output Impedance - YouTube
![transistors - What is the small signal gain for this circuit? - Electrical Engineering Stack Exchange transistors - What is the small signal gain for this circuit? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/lF5aC.png)
transistors - What is the small signal gain for this circuit? - Electrical Engineering Stack Exchange
![Small signal current gain (|H21|) vs. frequency (F) in linear operation... | Download Scientific Diagram Small signal current gain (|H21|) vs. frequency (F) in linear operation... | Download Scientific Diagram](https://www.researchgate.net/publication/305871692/figure/fig1/AS:568580661932032@1512571601975/Small-signal-current-gain-H21-vs-frequency-F-in-linear-operation-VD-03-V-for.png)