With advancements in CMOS technology, high speed analog circuits that were
traditionally implemented with discrete circuit components can now be made monolithically.
Antialiasing filters for video signals as well as signal conditioning filters in high
speed communication channels are examples of applications where high frequency integrated
circuits are now feasible. Transconductance-Capacitor or Gm-C filters are well
suited to these applications as they operate in the continuous-time domain and are able to
overcome the high-frequency and noise limitations imposed by clocked filter topologies.
This thesis covers the design of a programmable fourth-order Chebychev filter
with a 50MHz passband using the transconductance-C technique. A previously proposed
transconductor based upon a CMOS inverter is used to implement the filter. Since this
transconductor has no internal nodes, it can achieve extremely high bandwidths. However,
it requires a variable power source for programming. Thus, a wide-band, on-chip,
variable-BiCMOS power supply is presented as the method for setting the transconductance.
Practical design issues are addressed as well as many methods for compensating
non-idealities. Simulations of the filter as well as some parametric measurement of the
filter structures are presented. / Graduation date: 1994
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/36089 |
| Date | 30 July 1993 |
| Creators | Beck, Jeffery S. |
| Contributors | Kenney, John G. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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