Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1995-02-17
1996-09-24
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330260, H03F 345
Patent
active
055594700
ABSTRACT:
A fast parasitic-insensitive continuous-time filter and equalizer integrated circuit that uses an active integrator is described. Circuit techniques for excess-phase cancellation, and for setting the corner-frequency of the filter and equalizer are also described. These techniques result in a filter and equalizer chip with performance independent of process, supply, and temperature without employing phase-lock loops. This 20MHz 6th order Bessel filter and 2nd order equalizer operate from 5V, and generate only 0.24% (-52dB) of total harmonic distortion when processing 2Vp-p differential output signals. The device is optimized to limit high-frequency noise and to amplitude equalize the data pulses in hard disk read-channel systems. The device supports data rates of up to 36Mbps, and is built in a 1.5 .mu./4GHz BiCMOS technology.
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ML6006 Data Sheet, 36 Mbps Read Channel Filter/Equalizer, Micro Linear Corporation, San Jose, California, pp. 5-221-5-230, Jul. 1992.
Gray Paul R.
Laber Carlos A.
Micro Linear Corporation
Mottola Steven
Nguyen Tiep H.
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