ka7la
Newbie
Hello everyone ?
i am designing a mixer for optoelectronic data transmission where the input frequency is 26 GHz, LO frequency 0-13 GHz (or below) and output frequency 26-40 GHz.
First question: the switching quad bjts have to operate in saturation so it should be vb about the same as vc or am i wrong?
Second question: how should i bias the transconductance stage for high conversion gain and low noise?
third question: im using a T-Network as load and to match the output. is it a good idea?
last question: what should be the first step in the design ? the input and ouput matching ?
i am designing a mixer for optoelectronic data transmission where the input frequency is 26 GHz, LO frequency 0-13 GHz (or below) and output frequency 26-40 GHz.
First question: the switching quad bjts have to operate in saturation so it should be vb about the same as vc or am i wrong?
Second question: how should i bias the transconductance stage for high conversion gain and low noise?
third question: im using a T-Network as load and to match the output. is it a good idea?
last question: what should be the first step in the design ? the input and ouput matching ?