Hewlett used an incandescent bulb as a power detector, low pass filter and gain control element in the oscillator feedback path to control the output amplitude.
32.
The Negative and Positive Slews, were able to function as envelope followers, low pass filters, modulating waveforms, subharmonic generators, and audio oscillators.
33.
After amplification, the output pulse train can be converted back to an analog signal by passing through a passive low pass filter consisting of inductors and capacitors.
34.
In that application it was the pulse stream that was transmitted and the original analog signal recovered with a low pass filter after the received pulses had been reformed.
35.
While the proper low pass filter must be switch selected for the frequency range of interest, the result is considered to be a " no tune " design.
36.
Such a procedure solves the problem of poor passband responses of the low pass filters, with the added bonus that the resulting networks have the constant resistance property.
37.
Because the grids are complements of each other, these equations show that a capacitive mesh is a low pass filter and an inductive mesh is a high pass filter.
38.
The average amplitude of pulses is measured by the density of those pulses over time, thus a low pass filter is the only step required in the decoding process.
39.
In addition to the good design of the amplifier stages, the transmitter's output should be filtered with a low pass filter to reduce the level of the harmonics.
40.
A LISN functions as a low pass filter, which provides high impedance to the outside RF noise while allowing the low-frequency power to flow through to the EUT.
