Single capacitor functioning as an RC filter
An IC includes an RC filter, a doped layer under a first dielectric layer, a polysilicon layer on the first dielectric layer providing a polysilicon plate for a capacitor of the filter, and gate(s) for MOSFET(s). A second dielectric layer is on the polysilicon plate. An input contact is on one end of the polysilicon plate and an output contact is on the opposite end. A metal layer includes metal providing contact to at least input contact and metal providing contact to the output contact. Analog circuitry includes the MOSFET having an I/O node coupled to the RC filter.
TEXAS INSTRUMENTS INCORPORATED
H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H
H03H H03F H01L H03H H01L H03H H01L H03F H01L H01L H01L H03F H01L H03F H03F H01L H01L H01L H03F H01L H03H H01L H01L H01L H01L H01L H01L H01L H01L H01L
additional additional additional inventional additional inventional additional additional inventional additional inventional additional inventional additional additional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional
Lin Xiaoming Weibing Xianhui
Li Li Jing Dong