This section discusses typical CTLE characteristics and displays. Let us know if you would like the CTLE Analysis Tool enhanced with additional capability.
For discussion, a typical CTLE for use with serial data at a bit rate (BitRate) of 6.25 Gbps is defined with two zeros ( 1.0e9, 1.5e9 Hz) and three poles ( 1.8e9, 2.0e9, 10e9 Hz) with unity gain at 0 Hz. This results in 6 dB peaking gain at the Nyquist frequency (3.125e9 Hz).
This CTLE is simulated with sample rate of 32 * BitRate = 200e9 Hz to show its time domain impulse waveform and frequency domain magnitude responses. For the 6.25 Gbps data rate, one unit bit time interval (UI) is 160 psec.
Figure 1: The CTLE spectrum magnitude response is shown here.
Figure 2. The CTLE impulse waveform is shown here.
The CTLE Analysis Tool provides easy exploration of the response characteristics for a defined CTLE.