Operational Amplifiers

Operational Amplifiers - Operational Amplifiers Non-Ideal...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Operational Amplifiers Non-Ideal Operational Amplifiers Open Loop The open-loop response gives you some powerful insight into the op amp’s performance. Open-loop means NO feedback; the response of the “naked” op amp. Op Amps are generally used with feedback networks that return part of the output signal to the input, thus a loop is created in which signals flow through the amplifier to the output and back through the feedback network to the input Closed Loop – Refers to having the feedback network Open Loop – Refers to not having a feedback network A OL – is the gain of the op amp without a feedback network, thus its call open-loop gain. A v – is the gain of the op amp with the feedback network in place, this it’s the closed- loop gain. Real op amps have finite open-loop gain magnitude (referring to the open-circuit voltage gain of the op amp without feedback resistors). In analyzing open-loop circuits, (even with non-ideal op amps) still assume that the input impedance is infinite so the input current is zero
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Operational Amplifiers - Operational Amplifiers Non-Ideal...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online