edaoj
Newbie level 3
negative feedback amplifier
Hi,
I have to design a circuit that employs negative feedback to achieve the design
specifications shown below:
Closed-Loop Current Gain = 15 A/A up to 10 MHz with 60 degrees of Phase Margin
Closed-Loop Input Resistance < 1 Ohm
Closed-Loop Output Resistance > 10 MOhm
Supply voltages VDD = 2.5 V and VSS = -2.5 V
driving the load of 1K and capacitive load of 10pF.
The appropriate feedback seems to be shunt series. However I am not sure how to start my design and which way to initiate from scratch. Should I go with wilson and cascode current mirror? Is there any other better topolgy to work upon like OTA?
Any reply will be appreciated.
Thanks.
Hi,
I have to design a circuit that employs negative feedback to achieve the design
specifications shown below:
Closed-Loop Current Gain = 15 A/A up to 10 MHz with 60 degrees of Phase Margin
Closed-Loop Input Resistance < 1 Ohm
Closed-Loop Output Resistance > 10 MOhm
Supply voltages VDD = 2.5 V and VSS = -2.5 V
driving the load of 1K and capacitive load of 10pF.
The appropriate feedback seems to be shunt series. However I am not sure how to start my design and which way to initiate from scratch. Should I go with wilson and cascode current mirror? Is there any other better topolgy to work upon like OTA?
Any reply will be appreciated.
Thanks.
