I am trying to design a digitally controlled current source but I have doubts regarding whether the driving of the Mosfets in the Blue box is correct or not , I understand that for example when the output of U3 is postive then the P-channel Mosfet will be the one that conducts and need negative Gate Voltage and vise versa so that I didn't add the Voltage on the Emitter to the driving Gate voltage , but I am not sure that is correct and should work .. I will post the schematic kindly it will be helpful if some one tell me whether that part am confused about is correct or not  , also if any one have any concern about the functionality should work correct or not kindly tell me

Edit: The Step size is programmable also not only the value of the current

Thanks too much in advance

I am trying to design a digitally controlled current source but I have doubts regarding whether the driving of the Mosfets in the Blue box is correct or not , I understand that for example when the output of U3 is postive then the P-channel Mosfet will be the one that conducts and need negative Gate Voltage and vise versa so that I didn't add the Voltage on the Emitter to the driving Gate voltage , but I am not sure that is correct and should work. I will post the schematic; it will be helpful if some one tell me whether that part am confused about is correct or not, also if any one have any concern about the functionality should work correct or not.

The Step size is programmable also not only the value of the current.

I am trying to design a digitally controlled current source but I have doubts regarding whether the driving of the Mosfets in the Blue box is correct or not , I understand that for example when the output of U3 is postive then the P-channel Mosfet will be the one that conducts and need negative Gate Voltage and vise versa so that I didn't add the Voltage on the Emitter to the driving Gate voltage , but I am not sure that is correct and should work .. I will post the schematic kindly it will be helpful if some one tell me whether that part am confused about is correct or not , also if any one have any concern about the functionality should work correct or not kindly tell me

Thanks too much in advance

I am trying to design a digitally controlled current source but I have doubts regarding whether the driving of the Mosfets in the Blue box is correct or not , I understand that for example when the output of U3 is postive then the P-channel Mosfet will be the one that conducts and need negative Gate Voltage and vise versa so that I didn't add the Voltage on the Emitter to the driving Gate voltage , but I am not sure that is correct and should work .. I will post the schematic kindly it will be helpful if some one tell me whether that part am confused about is correct or not , also if any one have any concern about the functionality should work correct or not kindly tell me

Edit: The Step size is programmable also not only the value of the current

Thanks too much in advance