The input and output duty cycles are related by the formula: Tests of the circuit produced the oscilloscope capture shown in Figure 2. Both the 4.0954MHz oscillator signal (at the bottom) and the ...

By controlling the ratio of input signal to feedback ... but we’ll get something that’s ever more like a square wave as we keep passing the signal through further amplification stages.

Understand the concept of positive feedback and its role in amplifying signals in various systems effectively.

This amplifier compares the filtered voltage derived from the output square wave to the reference voltage, and adjusts the control voltage fed back to the comparator to maintain the duty cycle of the ...

When the one-fourth speed VCO signal is synced up to the input ... where there’s a full-range square wave, we’ll tap the input which has an analog triangle wave that bounces handily between ...

The input waveforms pass through anti-alias ... If the frequency of the square-wave signal source is such that one cycle takes place in approximately a power of two samples of the data-acquisition ...

Or, using a fifth- or seventh-order switched-capacitor filter with a square-wave output ties up two I/O pins on the MCU. One output is used for the filter input and one for the filter clock.

Throughout this Letter we will refer to such forward input as the ‘signal’ and the weak additional input wave that is injected when the strong forward input is present as the ‘noise’.