operational transconductance amplifier (OTA) is designed in this paper with the help of quasi-floating bulk MOSFET that achieved the DC gain of 88.61[Formula: see text]dB, unity gain frequency of 97.86[Formula: see text]MHz and power consumption of 430.62[Formula: see text][Formula: see text...
An integrated circuit buffer includes an input differential amplifier with a first current source transistor and a network with second current source transistors and cascode transistors loading the di
As you might imagine, a formula would come in handy. Here is the formula for the top triode in the cascode circuit acting as grounded-cathode amplifier, its cathode resistor the bottom triode and its actual cathode resistor. If we set the gain to 1 and solve for Rk, we get the followin...
Phono stages immediately come to mind, but there are many others. For example, the frontend of a single-ended power amplifier. The 12AU7 delivers a gain of about 50 in above cascode input stage, which is enough to the drive the output tube to full output. If even more gain were requir...
amplifier, if there is an impedance between output and input. In most cases it is only a capacitance. While the left side of the capacitor sees the input voltage, the right side sees the (mostly inverted) amplified input voltage, hence, in total, the capacitor sees (1 + gain) times ...
Both circuits use a triode as a transconductance amplifier and a transistor as a buffer, which tightly locks the triode in a fixed voltage potential. Both circuits yield the same formula for gain, roughly, Gain = gm · Rload, where gm refers to the triode's transconductance. In America, ...