Ummm...
An attenuator has gain between zero and one. Negative gain means the signal is inverted from input to output. Nigel, I think you had a brain fart.
We were just reading the same question differently - sometimes it's hard to write a question (even one as simple as this) and make it unambiguous. That's why it's important to give full details about what you're asking and why!.
I see...thanks so much for the replies,guys...I've thought that it's somehow related to the inverted output (180 degrees shifted)...thanks so much for the confirmation
I thought a negative amplifier (or an amplifier with a negative gain) means it does invert the signal? Maybe I am incorrectly correlating negative amplifier with negative gain?
There is no such thing as a negative amplifier nor negative gain.
The amplifier either has gain or attenuation and its output is either inverted or it is not.
I mean like when the gain of a buffer IC is listed as -2 in a Maxim datasheet- not as an actual term used to describe amplifiers. Is the OP talking about what it means when the gain for an amplifier is listed as a negative number? Or when someone says "negative gain" when talking about an amp?
There is no such thing as a negative amplifier nor negative gain.
The amplifier either has gain or attenuation and its output is either inverted or it is not.
Sorry..it's a typo..what i meant to type is an amplifier with negative gain...Moderators, u can change the title to avoid misunderstanding. I can't edit the thread's title..
Sorry..it's a typo..what i meant to type is an amplifier with negative gain...Moderators, u can change the title to avoid misunderstanding. I can't edit the thread's title..
Anyway we all know it isn't as simple as having a 180° or 0° phase shift, roll of frequency and unity gain phase shift are also important fro stability.