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# Sine Wave Filter

162 Threads found on edaboard.com: Sine Wave Filter

## Manually implementation of a FIR filter in a FPGA.

According to the wave window, the sine frequencies are not 1 MHz and 15 MHz. Apparently you still don't manage to scale ADD3 into filter_OUT, respectively to display the data with correct number format.

## [moved] how to change the frequency of ac suppyl...

I assume that you are talking about 230V single phase. In that case first you have to convert that AC (50Hz) to DC using rectifier and filter then using H bridge (IGBT) and sine PWM pulsing you will get sine wave of your required frequency. By varying the pulsing from microcontroller you can obtain 48Hz or 52Hz.

## Smoothing a rectified sine wave DDS

I produce a rectified sine wave 1Vpp 100Hz using a PIC + DAC 12bits. I would like to smooth the line by applying a filter. What filter do you suggest? 135668

Hello, I am designing and building a simple radio transmitter just to practise my electronic skills and learn a little bit more. I started by designing a clapp oscillator, which produce a sine wave with a fundamental at 1 MHz (the goal), and many harmonics at 2 MHz etc. My first question is if I should add a band filter to try to reduce (...)

## Generate a sine wave using a PIC microcontroller

You can have look at the basic working theory @ Its implemented for LPC2148 but the underlying working is the same. You need to generate or use a hardcoded sine lookup table which feeds values to your PWM block and at the PWM output use a filter which acts a D

## Using Si5153 to calibrate antenna (impedance measurement)

Problem is also that the bridge requires sine rather than square wave input. A filter (e.g. low-pass) is required. Could insert an amplifier too.

## Sine Wave generation using PWM and PIC16F72

At the output i am using 1kOhm and 102 to filter. 102 means 1 nF? 1k*1nF = 1?s time constant = low pass cut off frequency 160 kHz. How should it filter 20 kHz pwm? Secondly, why are you stepping through the sine table up and down alternatingly? Makes no sense. A sine full cycle should be repeated continuously, either up- (...)

## Filtering for different type of signals

Hi guys! I have one simple question. If I design a filter circuit for a sine wave signal, is it possible for the same filter circuit to be implemented for different type of signals (for example square wave, ping, etc)? The signal have the same frequency and used in the same environment. If yes, what are the (...)

## How to generate high frequency sine wave?

no other requirements? THD, impedance? phase noise? Perhaps sine filter on PECL output

## Square wave to sine wave with 40kHz frequency

A 40khz squarewave has harmonics at 80kHz, 120kHz, 160kHz and many higher multiples. An RC lowpass filter can be made with one series resistor then a capacitor to ground and it can reduce the harmonics a little but the filtered waveform will not yet be a sinewave unless many RC (...)

## Application of sine wave oscillator

For designing and measuring an audio amplifier I use a sinewave to measure its output power at clipping and its distortion. A sinewave has a defined peak to RMS relationship (peak V= 1.414 times RMS V) and has no harmonics. SPWM has switching artifacts that must be filtered out with a very good (...)

## Inductor core selection filtering AC (Final year project)

details of your output choke? which you assume is saturating? if you put an RC filter on the o/p of your H bridge, you can look at this on a scope and you should see a sine wave, if you operate your inverter with no load, unless the filter is properly damped (and not resonant at Fsw or Fo/p) you may well see some (...)

## FeedBack Path loop compensation in DC to AC inverters

hi, What type of feedback amplifier (type-2,type-3 or PI) is used in a pure sine wave inverter? Suppose an inverter consists of a h-bridge and a low frequency iron core toroidal transformer. H-bridge is derived by sinusoidally modulated PWM (20KHz). At the secondary of the transformer there is a filter to get filtered (...)

## Puresinewave Inverter

I have a Pic16f628a does anyone have a pure sine wave inverter design with a hex I could build with pcb also something like 500 watts or more.

## Why bandwidth and ac respones is different for Vpulse and Vsin as input in GmC filter

Sounds like a useless setup. Bandwidth respectively ac response is defined for sine input signals, not square wave. Usually AC response is determined for small signal, e.g. using AC analysis of a circuit simulator (with VAC source). A large signal transient analysis can be performed with different waveforms (e.g. VSIN or VPULSE), but (...)

## PWM frequency and LC filter

I'm new here, I have some fairly basic doubt. I am creating a PWM signal in MatLab by comparing a sine wave (50Hz) and a triangular wave (2kHz) .... 1- So what is the PWM frequency will output? 2- After getting the PWM signal filters I want to get a sinusoid, using an LC filter, but do not know what (...)

## Problem with 12 to 220 inverter

Your schematic looks as though its output is square waves. However your meter probably is calibrated for sinewaves. I too got a low reading from my DMM, when checking output from an inexpensive commercial inverter. (It produced either square waves or modified sinewaves.) I recall my (...)

## Transformer based linear power supply output behavior

Hello, I have designed a linear power supply using a step down transformer, bridge rectifier and a filter capacitor , there on it goes to a shunt regulator TL431 to generate 3V3. Ratings: Transformer 6V 230mA at 230V AC Input. Capacitor: 2200uF/16V The load is a 16 Digit Seven Segment Display module with each segment drawing about 8-9

## wide tuning range sine wave generation up to RF

Thanks for the reply. I didn't quite understand some of it. So you're saying that you take two VCOs and mix them together (one of which is a voltage controlled cavity resonator)? What did you mean by "offset by the fmax"? In my example (1 MHz to 5 GHz), can you give some numbers? I can imagine that you could mix together two oscillators, one tuna

## how to perform a low pass filtering to a current signal

Hi all, if we have a current mirror to generate a current source signal or sink signal, with repetitive rate frequency, such as sine wave, are we able to apply some low pass filtering circuit directly to this current, and generate a close to DC level current? Thank you!