Howland's improved circuit output resistance

nnaroon

Howland's improved circuit output resistance [Copy link]

What is Ro expression? Can you guys tell me more about it?

maychang

It can be derived by slightly changing formula (2.8) in the book. See formula (2.15a) in the book.

nnaroon

maychang posted on 2022-3-16 11:46 It can be derived by slightly changing the formula (2.8) in the book. See formula (2.15a) in the book.

I really have no idea, could you please draw the equivalent circuit?

okhxyyo

Has the landlord's problem been solved?

nnaroon

okhxyyo posted on 2022-3-17 13:02 Has the original poster's problem been solved?

not yet

Gen_X

This is a typical constant current circuit. R2B is the internal sampling resistor, which determines the maximum output value when the input is maximum.

Ro does not affect the proportional relationship between output Io and input Vi within a certain range.