Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

[SOLVED] Stepping down sinusoidal voltage

Status
Not open for further replies.
manishanand14

manishanand14

Full Member level 4
Joined
Sep 3, 2011
Messages
203
Helped
10
Reputation
20
Reaction score
9
Trophy points
1,308
Location
Bangalore ,India
Activity points
2,572
Hello Everyone!

We know that an non-inverting amplifier built around an op-amp will amplify the input AC waveform with some finite gain set by the resistors.

Do we have something to do the opposite thing say feeding 1V Amplitude/1000Hz AC waveform to some circuit and getting out 5mV Amplitude AC waveform. [ I don't want to use a voltage divider or a transformer]
 

NO WE cannotttt!!! there are BJT's, FET's etc inside amplifiers and it can never work other way around , for eg how can u get output from the gate of any mosfet ???? you certainly can't . you need a voltage divider or use a transformer
 

Hi,

you can build an inverting OPAMP circuit with a 200k input resistor and a 1000 Ohms feedback resistor.

Is this what you want?


Klaus
 
A gain of less than unity is possible for the inverting configuration. However, for the non inverting configuration the gain can never fall below unity for any value of resistance.
 
HTML: 
you can build an inverting OPAMP circuit with a 200k input resistor and a 1000 Ohms feedback resistor.

What about the stability issues? Will it be stable?
 

Hi,

it depends on the opamp.

look for unity gain stable opamps.

Klaus
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top