A switched capacitor circuit ( ) including an operational amplifier ( ) having an input and an output, a sampling capacitor ( ) and a set of switches ( and ) are disclosed. During a first phase, switches ( ) sample an input voltage by charging sampling capacitor ( ). During a first portion of a second phase, the operational amplifier input is electrically coupled to sampling capacitor ( ) through a first path including switch ( ) having a first time constant. During a second portion of the second phase, the operational amplifier input is electrically coupled with sampling capacitor ( ) through a second path including switch ( ) having a second time constant, the second time constant being smaller than the first time constant.
Switched-Capacitor Summer Circuits And Methods And Systems Using The Same
A switched- capacitor summer includes an operational amplifier having an input and an output, first and second parallel capacitors , first switching circuitry and second switching circuitry. First switching circuitry discharges first capacitor during a first timing phase and couples second capacitor between the input and the output of operational amplifier during a first timing phase. Second switching circuitry couples a first capacitor between the input and output of operational amplifier during the second phase to transfer charge from capacitor C to capacitor and charge up capacitor C during the second phase.
Delta-Sigma Modulators With Improved Noise Performance
John Laurence Melanson - Austin TX Yu Qing Yang - Austin TX
Assignee:
Cirrus Logic, Inc. - Austin TX
International Classification:
H03M 300
US Classification:
341143, 341150
Abstract:
An integrator stage for use in a delta sigma modulator includes an operational amplifier, an integration capacitor coupling an output of the operational amplifier and a summing node at an input of the operational amplifier, and a feedback path. The feedback path includes first and second capacitors having first plates coupled electrically in common at a common plate node and switching circuitry for sampling selected reference voltages onto second plates of the capacitors during a sampling phase. The integrator stage further includes a switch for selectively coupling the common plate node and the summing node during an integration phase.
Delta-Sigma Modulators With Improved Noise Performance
John Laurence Melanson - Austin TX, US Yu Qing Yang - Austin TX, US
Assignee:
Cirrus Logic, Inc. - Austin TX
International Classification:
H03M003/00
US Classification:
341143, 341150
Abstract:
An integrator stage for use in a delta sigma modulator includes an operational amplifier, an integration capacitor coupling an output of the operational amplifier and a summing node at an input of the operational amplifier, and a feedback path. The feedback path includes first and second capacitors having first plates coupled electrically in common at a common plate node and switching circuitry for sampling selected reference voltages onto second plates of the capacitors during a sampling phase. The integrator stage further includes a switch for selectively coupling the common plate node and the summing node during an integration phase.
Chemosensitization By Bi-Functional Small Hairpin Rna (Bi-Shrna)
Alex W. Tong - Dallas TX, US Yu Yang - Allen TX, US Donald Rao - Dallas TX, US Phillip B. Maples - Pilot Point TX, US Neil Senzer - Dallas TX, US John J. Nemunaitis - Cedar Hill TX, US Zhaohui Wang - Grapevine TX, US
Compositions and methods of augmenting the anti-tumor activities of docetaxel and other taxanes by combination with a bi-functional small hairpin RNA (bi-shRNA) is described herein. The instant invention describes the interactive outcome of STMN1 knockdown with docetaxel. In vitro docetaxel (DOC) dose response assessments with or without co-treatment with bi-shRNAin CCL-247 and SK-MEL-28 melanoma cells indicated that STMN1 knockdown significantly reduced DOC concentration needed to inhibit cancer cell growth by 50% (IC) of CCL-247 cells from 1.80.2 to 0.60.4 nm (n=3, p