The working theory behind the voltage control circuit in this copitts common base VCO

[silver_sparrow]

Hi

Can any one tell me the working theory behind the voltage control
circuit in this copitts common base vco[attached jpg].

The voltage control ckt is in the centre of the figure. So plz explain
the following:

*purpose of resistor[1000ohm] from between transistors. Center and left transistor
*why we use a current source/mirror to pull the center transistor
*the capacitor at the volt control port: between the center transistor
and current mirror.

Also, this schematic is in @DS, but if I were to simulate it in C@dence
what ports would I need and were would I stick them?

thnx
Sparrow

 

[VSWR]

vco theory

The details in the jpg-file is not readable. Can you provide the ADS project files instead?

 

[silver_sparrow]

theory of vco

Here it is.

I did not .rar it, just change the extension from .rar to .zap