Clock-feedthrough effects, channel-length modulation and device mismatch are
the main causes of the inaccuracy of Switched-Current (SI) circuits. In this paper, these
non-ideal effects are analyzed. A high-performance current mirror, namely regulated
cascode current mirror, which eliminates drain voltage variation problem is introduced.
By using this current mirror as a basic memory cell, a clock-feedthrough cancellation
circuit is developed, which ideally solves the clock-feedthrough and drain voltage
variation problems. A fifth-order SI lowpass Chebyshev ladder filter is built using the
proposed cancellation circuit and implemented in a two-micron P-well standard digital
CMOS process by MOSIS. Another emerging technique, dynamic current mirrors or
current copiers, is introduced. Improved dynamic current mirror cell and dynamic
current mirror-based integrators have been developed. / Graduation date: 1992
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/37000 |
| Date | 07 May 1991 |
| Creators | Hoei, Jung-sheng |
| Contributors | Allstot, David J. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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