有限带宽信号采样和混叠的数学分析 - maxim-dallas.mht

本人收集的面试题：包含通信原理

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=BF=ED=B5=C4=A1=A3=B8=B5=C1=A2=D2=B6=B1=E4=BB=BB=B6=A8=C2=C9=B8=E6=CB=DF=CE=
=D2=C3=C7=A3=AC=C8=E7=B9=FB=D2=BB=B8=F6=D0=C5=BA=C5=B5=C4=B3=D6=D0=F8=CA=B1=
=BC=E4=CA=C7=D3=D0=CF=DE=B5=C4=A3=AC=D4=F2=CB=FC=B5=C4=C6=B5=C6=D7=BE=CD=BB=
=E1=D1=D3=D5=B9=B5=BD=CE=DE=CF=DE=C6=B5=C2=CA=B7=B6=CE=A7=A3=AC=C8=E7=B9=FB=
=CB=FC=B5=C4=B4=F8=BF=ED=CA=C7=D3=D0=CF=DE=B5=C4=A3=AC=D4=F2=CB=FC=B5=C4=B3=
=D6=D0=F8=CA=B1=BC=E4=CA=C7=CE=DE=CF=DE=B5=C4=A1=A3=BA=DC=CF=D4=C8=BB=A3=AC=
=CE=D2=C3=C7=D5=D2=B2=BB=B5=BD=D2=BB=B8=F6=B3=D6=D0=F8=CE=DE=CF=DE=CA=B1=BC=
=E4=B5=C4=CA=B1=D3=F2=D0=C5=BA=C5=A3=AC=CB=F9=D2=D4=D2=B2=B2=BB=BF=C9=C4=DC=
=D3=D0=D5=E6=D5=FD=B5=C4=D3=D0=CF=DE=B4=F8=BF=ED=D0=C5=BA=C5=A1=A3=B2=BB=B9=
=FD=BE=F8=B4=F3=B2=BF=B7=D6=CA=B5=BC=CA=D0=C5=BA=C5=B5=C4=C6=B5=C6=D7=C4=DC=
=C1=BF=B6=BC=BC=AF=D6=D0=D4=DA=D3=D0=CF=DE=B4=F8=BF=ED=C4=DA=A3=AC=D2=F2=B4=
=CB=C7=B0=C3=E6=B5=C4=B7=D6=CE=F6=B6=D4=D5=E2=D0=A9=D0=C5=BA=C5=C8=D4=C8=BB=
=D3=D0=D0=A7=A1=A3
                                <P>
                                =
<H2>=B2=C9=D1=F9=D5=FD=CF=D2=D0=C5=BA=C5</H2>=B2=C9=D1=F9=D5=FD=CF=D2=D0=C5=
=BA=C5=BF=C9=D2=D4=B7=C7=B3=A3=BC=F2=B5=A5=BA=CD=B7=BD=B1=E3=B5=D8=D5=B9=CA=
=BE=B7=A2=C9=FA=BB=EC=B5=FE=CA=B1=B8=DF=C6=B5=B3=C9=B7=D6=B3=CA=CF=D6=CE=AA=
=B5=CD=C6=B5=B3=C9=B7=D6=D5=E2=D2=BB=B9=CC=D3=D0=CF=D6=CF=F3=A1=A3=B4=BF=B4=
=E2=D5=FD=CF=D2=D0=C5=BA=C5=B5=C4=C6=B5=C6=D7=BD=F6=B0=FC=C0=A8=CF=E0=D3=A6=
=C6=B5=B5=E3=C9=CF=B5=C4=BC=E2=B7=E5=D0=C5=BA=C5=20
                                =
(=B3=E5=BC=A4=BA=AF=CA=FD)=A3=AC=B3=F6=CF=D6=BB=EC=B5=FE=CA=B1=A3=AC=BC=E2=
=B7=E5=BB=E1=B4=D3=D2=BB=B8=F6=C6=B5=B5=E3=D2=C6=B5=BD=C1=ED=D2=BB=B8=F6=C6=
=B5=B5=E3=A1=A3
                                =
<P>=D2=D4=CF=C2=BD=E1=B9=FB=CA=C7=D3=C3125Msps=A1=A212=CE=BBADC=20
                                =
MAX19541=B2=E2=CA=D4=B5=C3=B3=F6=B5=C4=A1=A3<B>=CD=BC6</B>=CB=F9=CA=BE=CE=
=AA=CA=E4=C8=EB=D0=C5=BA=C5=C6=B5=C2=CAf<SUB>IN</SUB> =3D=20
                                =
11.5284MHz=CA=B1=B1=E4=BB=BB=C6=F7=CA=E4=B3=F6=D0=C5=BA=C5=B5=C4=C6=B5=C6=
=D7=A1=A3=CA=FD=BE=DD=CF=D4=CA=BE=D6=F7=BC=E2=B7=E5=D5=FD=BA=C3=B3=F6=CF=D6=
=D4=DA=B8=C3=C6=B5=B5=E3=C9=CF=A1=A3=C6=B5=C6=D7=D6=D0=BB=B9=D3=D0=D2=BB=D0=
=A9=C6=E4=CB=FC=B5=C4=BC=E2=B7=E5=A3=AC=CB=FC=C3=C7=CA=C7=D3=C9=D7=AA=BB=BB=
=C6=F7=B5=C4=B7=C7=CF=DF=D0=D4=D2=FD=C6=F0=B5=C4=D0=B3=B2=A8=A3=AC=BA=CD=B1=
=BE=CE=C4=B5=C4=CC=D6=C2=DB=D6=F7=CC=E2=CE=DE=B9=D8=A1=A3=D3=C9=D3=DA=B2=C9=
=D1=F9=C6=B5=C2=CAf<SUB>SAMPLING</SUB>=20
                                =3D =
125MHz=A3=AC=D4=B6=B4=F3=D3=DA=C4=CE=BF=FC=CB=B9=CC=D8=B6=A8=C2=C9=D2=AA=C7=
=F3=B5=C4=C1=BD=B1=B6=CA=E4=C8=EB=C6=B5=C2=CA=A3=AC=CB=F9=D2=D4=B2=BB=BB=E1=
=B3=F6=CF=D6=BB=EC=B5=FE=A1=A3
                                <P><IMG=20
                                alt=3D"=CD=BC6. MAX19541 =
ADC=B2=C9=D1=F9=BA=F3=B5=C4=D0=C5=BA=C5=C6=B5=C6=D7=A1=A3fSAMPLING =3D =
125MHz, fIN =3D 11.5284MHz."=20
                                =
src=3D"http://www.maxim-ic.com.cn/images/appnotes/3628/3628Fig06.gif"><BR=
><I>=CD=BC6.=20
                                MAX19541 =
ADC=B2=C9=D1=F9=BA=F3=B5=C4=D0=C5=BA=C5=C6=B5=C6=D7=A1=A3f<SUB>SAMPLING</=
SUB> =3D=20
                                125MHz, f<SUB>IN</SUB> =3D 11.5284MHz. =
</I>
                                =
<P>=BD=D3=CF=C2=C0=B4=BF=BC=C2=C7=C8=E7=B9=FB=B0=D1=CA=E4=C8=EB=C6=B5=C2=CA=
=CC=E1=B8=DF=B5=BDf<SUB>IN</SUB> =3D=20
                                =
183.4856MHz=A3=AC=D6=F7=BC=E2=B7=E5=B5=C4=CE=BB=D6=C3=BB=E1=B7=A2=C9=FA=CA=
=B2=C3=B4=B1=E4=BB=AF=A1=A3=B8=C3=CA=E4=C8=EB=C6=B5=C2=CA=B4=F3=D3=DAf<SU=
B>SAMPLING</SUB>/2=A3=AC=BF=C9=D2=D4=CF=EB=CF=F3=BB=E1=D3=D0=BB=EC=B5=FE=B3=
=F6=CF=D6=A1=A3<B>=CD=BC7</B>=B8=F8=B3=F6=C1=CB=B5=C3=B5=BD=B5=C4=C6=B5=C6=