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Thank you for your reply. I'm working in RFIC. i want to build a chip with a 433MHz transmitter. i mut design a PLL ( Phase detector, VCO, filter, Divider), a Modulator (simple) and a Power Amplifier. all of those must to be designed in 0.7u CMOS process. could someone help me?
you may refer to RFMD's rf2510/rf2512 architechture
they are ask/fsk tx
for a fsk tx, you can modulate the vco directly
for a ask tx, you can turn on/off the driving amplifier
after the circuit arch is determinated, it is what you are trainned to