Elecemperor
Junior Member level 2
It is stated in several papers that if you design a DA using high-pass transmission lines, the DA would most probably act as a band-pass amplifier as the line losses degrade performance in high frequencies and decrease the gain.
I have designed a BPDA based on this concept, and I'm facing a problem I already guessed I would have: Due to the presence of the capacitors in the series arm of the T-sections that form my artificial line, the gain does not show an additive nature any more. In the conventional DA the whole point was that you could absorb the transistor parasitic capacitance into the line and add the amplified signals in all the drain nodes thanks to the series inductors. How is this supposed to happen when the line is high-pass?!
I have designed a BPDA based on this concept, and I'm facing a problem I already guessed I would have: Due to the presence of the capacitors in the series arm of the T-sections that form my artificial line, the gain does not show an additive nature any more. In the conventional DA the whole point was that you could absorb the transistor parasitic capacitance into the line and add the amplified signals in all the drain nodes thanks to the series inductors. How is this supposed to happen when the line is high-pass?!
Last edited: