Due the impossibility to realize an integrated one, I have abbandoned the idea. I will design a Colpitts VCO using discrete components(JFET or BJT), where can I find a good design guide?
Bye
With "Due the impossibility to realize an integrated one" I means that I don't have enough time to wait the end of a foundry process for device testing.
With "Due the impossibility to realize an integrated one" I means that I don't have enough time to wait the end of a foundry process for device testing.
There are a number of instrumentation amps that can convert differential to single ended near your VCO. I assume you are wanting differential to avoid noise. The ground reference of the instrumentation amp can be physically layed out to be the exact same point as the VCO ground reference and then ground noise from the source to your VCO is almost eliminated. I think there are some application notes from Analog Devices for a high speed analog multiplier chip that has differential inputs. This one chip might serve as your differential input and VCO. I think you may be limited to a few hundred MHz with this chip.
I am new to the forum. If I read the thread correctly single ended is OK for you but not differential. I have been through this before and recommend converting SE to DE or visa versa using a balun built out of discretes. This technique works very well at 1 GHz.
