Wide band-width operational amplifier

Details Wide band-width operational amplifier Wide band-width operational amplifier

1997-03-21

1999-03-09

Mullins, James B.

Amplifiers

With plural amplifier channels

Amplifying different frequencies in different channels

330127, 330151, 330260, 330294, 330305, 330306, 331135, 327557, H03F 368

Patent

active

058806342

ABSTRACT:
Various circuit techniques to implement continuous-time filters with improved performance are disclosed. The present invention uses RMC type integrators that exhibit lower harmonic distortion. In one embodiment, a novel high-gain two-pole operational amplifier is used along with RMC architecture to achieve lower harmonic distortion. In another embodiment, the present invention uses dummy polysilicon resistors to accurately compensate for the distributed parasitics of the polysilicon resistors used in RMC integrator. In yet another embodiment, the present invention provides an on-chip tuner with a differential architecture for better noise immunity.

REFERENCES:
patent: 5006733 (1991-04-01), Brown
patent: 5021681 (1991-06-01), Colbeck et al.
patent: 5063309 (1991-11-01), Yamasaki
patent: 5281931 (1994-01-01), Bailey et al.
patent: 5357208 (1994-10-01), Nelson
patent: 5530399 (1996-06-01), Chambers et al.
patent: 5625317 (1997-04-01), Deveirman

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