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This paper discusses the design, analysis and performance of a low-voltage, highly linear switched-R-MOSFET-C filter. High linearity, even at a low supply voltage, is achieved through the use of duty-cycle-controlled tuning. Tuning MOSFETs are switched completely on while conducting, such that their nonlinear resistance is much smaller than the linear… (More)

- Peter Kurahashi, Pavan Kumar Hanumolu, Gabor C. Temes, Un-Ku Moon
- IEEE Custom Integrated Circuits Conference 2006
- 2006

The design and performance of a switched-R-MOSFET-C filter is presented in this paper. The filter achieves -77dB THD using a 0.6V supply, and -90dB THD using a 0.8V supply, with a 0.6Vpp differential 2kHz sine input. High linearity at a low supply voltage is achieved by the use of duty-cycle controlled tuning inside a feedback loop

A method to generate stable transconductance (gm) without using precise external components is presented. The off-chip resistor in a conventional constant-gm bias circuit is replaced with a variable on-chip resistor. A MOSFET biased in triode region is used as a variable resistor. The resistance of the MOSFET is tuned by a background tuning scheme to… (More)

- Peter Kurahashi, Pavan Kumar Hanumolu, Un-Ku Moon
- 2008 IEEE Custom Integrated Circuits Conference
- 2008

This paper describes a downconversion filter which uses variable delay clocks to simultaneously perform downconversion mixing and filter bandwidth tuning. This method of bandwidth tuning is highly linear and applicable to low supply voltages. The test chip fabricated in a 0.18 mum CMOS process achieves 19.2 dBV IIP3 at 1 V and has a bandwidth that is… (More)

- Skyler Weaver, Benjamin P. Hershberg, Peter Kurahashi, Daniel Knierim, Un-Ku Moon
- IEEE Trans. on Circuits and Systems
- 2010

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