Hi,
I have a question of EVAL-HMC460LC5. I have tested the evaluate board, and the current was great than 83mA when the Vgg is adjusted between -2V to 0V. It seems that the board work well, and the gain is ok. but i want know whether it is ok of the current? and which is optimal of vgg?
best regards.
Guo.
You need to set Idd=75mA, therefore adjust Vgg in order to get target Idd.
Are you able to do this? What is Vgg at this Idd?
Thanks
Ivan S
Thank for your reply. The current of IDD was always great than 83mA，even I tried to adjust the voltage of Vgg with range between zero to minus two volts. Because the Vgg should be not less than -2V， I can not adjust more. However, the current of IDD was always decreasing when the voltage of Vgg is adjusted from 0 to -2V. Btw, the input is PRBS data steam with datarate of 1Gbps.
guo.
I got confused- What do you use as excitation signal and what freq at input of amplifier,?
Can you set Idd when there is no input signal?
Regards
IvaN S
The single frequency is not used as input signal. Instead, a square wave with 1GHz repetition frequency is used as excitation signal.
best regards
Guo
Bias needs to be set without rf signal.