公开(公告)号：US20200382154A1

公开(公告)日：2020-12-03

申请号：US16889716

申请日：2020-06-01

申请人： Vivek Mangal ,  Peter R. Kinget

发明人： Vivek Mangal ,  Peter R. Kinget

IPC分类号： H04B1/709 ,  H03M1/46 ,  H03M1/80 ,  H03D7/16

摘要： Circuits for continuous-time analog correlators are provided, comprising: a first VCO that receives an input signal and that outputs a first pulse frequency modulated (PFM) output signal; a second VCO that receives a reference signal and that outputs a second PFM output signal; a first phase frequency detector (PFD) that receives the first PFM output signal and the second PFM output signal and that produces a first PFD output signal; a first delay cell that receives the first PFM output signal and that produces a first delayed signal (DS); a second delay cell that receives the second PFM output signal and that produces a second DS; a second PFD that receives the first DS and the second DS and that produces a second PFD output signal; and a capacitor-digital-to-analog converter (capacitor-DAC) that receives the first PFD output signal and the second PFD output signal and that produces a correlator output.

公开(公告)号：US11050457B2

公开(公告)日：2021-06-29

申请号：US16889716

申请日：2020-06-01

申请人： Vivek Mangal ,  Peter R. Kinget

发明人： Vivek Mangal ,  Peter R. Kinget

IPC分类号： H04B1/00 ,  H04B1/709 ,  H03D7/16 ,  H03M1/80 ,  H03M1/46

摘要： Circuits for continuous-time analog correlators are provided, comprising: a first VCO that receives an input signal and that outputs a first pulse frequency modulated (PFM) output signal; a second VCO that receives a reference signal and that outputs a second PFM output signal; a first phase frequency detector (PFD) that receives the first PFM output signal and the second PFM output signal and that produces a first PFD output signal; a first delay cell that receives the first PFM output signal and that produces a first delayed signal (DS); a second delay cell that receives the second PFM output signal and that produces a second DS; a second PFD that receives the first DS and the second DS and that produces a second PFD output signal; and a capacitor-digital-to-analog converter (capacitor-DAC) that receives the first PFD output signal and the second PFD output signal and that produces a correlator output.