Lowe Hauptman & Ham, LLP
Phase-locked loops that share a loop filter and frequency divider
A shared loop filter includes an input port configured to selectively receive a first input from a first charge pump. The first charge pump is connected to a first phase locked loop (PLL) in a first die. The input port is further configured to selectively receive a second input from a second charge pump, the second charge pump connected to a second PLL in a second die separate from the first die. The shared loop filter further includes an output port configured to selectively provide an output to a first voltage controlled oscillator (VCO). The first VCO is connected to the first PLL. The output port is further configured to selectively output a second output to a second VCO. The second VCO is connected to the second PLL.
Taiwan Semiconductor Manufacturing Company, Ltd.
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Huan-Neng Yen-Jen Feng Wei Shyh-An Chewn-Pu
Chen Chen Kuo Chi Jou