sharkies
Member level 5
at the end of the RF transmitter signal chain, drive amplifier amplifiers the RF signal to high voltage swing. Theoretically, the swing can be as high as 2VDD. For example, if the drive amplifier is connected to 2.5V supply through a RF choke, then the output swing can be as high as 5V.
I was just wondering how one would make the ESD pad for such large swing. Usually we have power rails connected to a diode in the signal pads. Therefore, assuming 0.7V turn on voltage for the diode, the signal swing can be either as low as -0.7V or as high as 3.2V. How do you handle higher voltage than that? How do you reach 5V?
any document or explanation will be helpful
Thanks you.
I was just wondering how one would make the ESD pad for such large swing. Usually we have power rails connected to a diode in the signal pads. Therefore, assuming 0.7V turn on voltage for the diode, the signal swing can be either as low as -0.7V or as high as 3.2V. How do you handle higher voltage than that? How do you reach 5V?
any document or explanation will be helpful
Thanks you.