# Questions tagged [cutoff-frequency]

A cutoff frequency is a frequency boundary in a system's frequency response at which the power level is greater or less than a given fixed value.

136 questions
Filter by
Sorted by
Tagged with
51 views

### Waveform acquired from scope, what is the sample rate for post processing?

I want to make a noise measurement with my scope, but I need it to be band-limited. I am using a Tektronix TBS1102, which allows me to save to a USB flash drive an Excel/CSV file with the X and Y ...
35 views

### Input signal bandwidth of ADC

I prepare to use adc to do sub-sampling. Most SAR adc has -3dB input signal bandwidth in datasheet but no for delta-signam adc. Can I use modulation frequency as the bandwidth or there is another way ...
68 views

### Parallel-series RC circuit

I wanted to calculate frequencies of filter The module of impedance which I got is equal What is the frequency cutoff of this circuit? I've made a simulation but I wanted to get frequency cutoff.
1 vote
94 views

### Why is the relation between voltage ratio and frequency a linear one in a lumped transition line?

In an experiment the cutoff frequency of a lumped transmission line is determined by measuring the ratio of the output/input voltages. The lumped transmission line is a ladder network of 40 capacitors ...
230 views

### Simulating an RLC bandpass filter with LTspice

I have analyzed the filter in question both in practice and in simulation (with LTspice) The calculations I performed to determine the high and low cutoff frequency and the resonance frequency are as ...
115 views

### Frequency response of low pass filter

I have an ideal low pass filter having cutoff frequency 1kHz. If I provide an input having single frequency component at 1kHz, will there be any output or zero?
51 views

### Filter for AC line coupling with audio signal source

I need a sharp notch filter (higher order) for the 50-60 Hz band, to be placed between AC 220/125 V power line and an audio source (not necessarily amplified), such that the input signal from the ...
47 views

### The field in a waveguide at exactly the cut-off frequency

Can anyone explain to me qualitatively, what kind of field exists inside a waveguide at EXACTLY the cut-off frequency? I would be grateful if an explanation was given about waveguides with metalic ...
104 views

### I want to find the corner frequency of this second order low pass filter

As there is an isolator an between, I have tried multiplying the individual transfer functions to get the combined function and then equated it with -3dB.
70 views

### Can an ADXL327 accelerometer be used with theoretically unlimited bandwidth?

I saw several studies that use the 3-axis ADXL327 accelerometer, 0.1-3000 Hz band-pass filtered and sampled at 20KHz based on previous studies that showed that the signals of interest have frequencies ...
77 views

### Why is the noise gain these opamps 500? I feel it should be 250

I wanted to check the bandwidth of the first stage of an instrumentation amplifier configuration and this is the circuit: Since, the noise gain of an opamp is (1+Rf/R1), for each of the op-amps the ...
143 views

### Cut Off Frequency in the Frequency Response of RC circuit

In the frequency response curve of RC circuit, why does the curve falls rapidly after the breakpoint? It approximates to a certain amplitude upto the breakpoint. In the diagram, given below, it is ...
2k views

### Cutoff frequency of RLC band pass and band stop filter

I have found in a website that the cutoff frequencies of a series RLC bandpass and bandstop filters are: $$f_c = \sqrt{\left(\frac{R}{2L}\right)^2+\frac{1}{LC}}\pm\frac{R}{2L}.$$ This is the link ...
67 views

### About the cut off frequency

I am doing a work that basically we need to study the graphs given by an oscilloscope, and with it, find the cut off frequency of the circuit that better approach the data given by the oscilloscope (...
208 views

### Frequency response of difference amplifier

I'm studying the difference amplifier circuit configuration of op amps, reading from this datasheet. I know that unlike the instrumentation amplifiers, the difference amplifier differential gain can ...
1 vote
109 views

1 vote
96 views