Precise Equalizing Circuit
Original Publication Date: 1988-Dec-01
Included in the Prior Art Database: 2005-Feb-15
The figure shows a simple and precise equalizing network for correction frequencies attenuation involved by the transmission network in data transmission. The equalizer (EQL) uses diodes resistance in little AC signals to realize precise first-order transfer function, without tuning, with a minimum cost and component numbers. First-order equalizer transfer function This function named F is theoretically equal to the module of 1 + p/WO, where p is the imaginary pulsation: p = j*W. WO is the pulsation at which the EQL starts to amplify the spectrum of the received signal. The signal level and the WO value are lower. As the signal spectrum is high-frequency limited, it is necessary to limit the EQL gain at the end of this spectrum to avoid amplifying noise and, thus, to degrade the signal/noise ratio.