Area-Efficient Switched Capacitor Filters: Very Large Time-Constant Circuits
Abstract
The detailed theoretical analysis of very large time-constant (VLT) integrators which use either charge elimination (T-cell and Huang's integrators) or charge cancellation (Nagaraj`s and charge differencing integrators) are described. Using a new area efficient design, the charge differencing (CD) integrator, the capacitance spread ratio can be easily reduced to less than the reciprocal of the square root of the product of the pole frequency and the sampling period. nonideal effects of op-amp like finite DC gain and offset voltage can also be compensated by employing offset storing capacitor operating only with the bi-phase clocking scheme.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1992
- Accession Number
- ADA454956
Entities
People
- Jyhfong Lin
- Shihab A Shamma
- Thomas H Edwards
Organizations
- University of Maryland