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Please do specify in detail the technology you want to realize your up-converter such as CMOS of BiCMOS, judging from your frequency of application, it could be said that CMOS technology would play the trick, in realizing the upconverter. First get hold some basics of four quadrant multipliers, phase shifters and active BPF's in CMOS technology, then build up a balanced modulator to perform your up conversion action.
Dear hrkhari;
thanks
it's not important the technology for me in this step.
i want to know that about the ICs that made for this purpose.
for example is there any IC for synthesizer for UHF band (400-870mhz)?
and i want to know about specification of upconverter?
The specs are decided by the application. If its a commercial design, then the end user has to have an idea of what is required. otherwise if its a hobby design, you can yourself specify the common parameters. The basic parameter may look like -
1. Input and output frequencies
2. Input and output power levels
3. Input and output VSWR
4. Input and output Impedances
5. Gain flatness and stability
6. Third order intercept point
7. AM/PM conversion
8. Group delay etc.
Dear m229,
your output frequency band is in the IV and V TV UHF band. Are you trying to build up TV upconverter (TV IF or I band to UHF)? Designs differ regarding to type of modulation of the signal you are trying to convert. It is not the same thing if you want to convert analogue TV signal or digital or maybe something else.
Have you considered to buy a very cheaper TV modulator rather than design it?
On the broadcast TV market there are small, cheaper, and well engenerized modules.
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