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LMX2595: RAMP功能

Part Number: LMX2595

1.首先我使用10Mhz参考时钟 ,20Mhz鉴相频率。想使用自动RAMP模式,进行线性调频 扫频从170Mhz到230Mhz。

2.TICS仿真:

寄存器:

HexRegisterValues.txt
R112	0x700000
R111	0x6F0000
R110	0x6E0000
R109	0x6D0000
R108	0x6C0000
R107	0x6B0000
R106	0x6A0001
R105	0x690000
R104	0x684E20
R103	0x672824
R102	0x663FFE
R101	0x650010
R100	0x644E20
R99	0x63D7DC
R98	0x620004
R97	0x618800
R96	0x600000
R95	0x5F0000
R94	0x5E0000
R93	0x5D0000
R92	0x5C0000
R91	0x5B0000
R90	0x5A0000
R89	0x590000
R88	0x580000
R87	0x570000
R86	0x560000
R85	0x550000
R84	0x540001
R83	0x530000
R82	0x529000
R81	0x510000
R80	0x500000
R79	0x4F0100
R78	0x4E0003
R77	0x4D0000
R76	0x4C000C
R75	0x4B0A00
R74	0x4A0000
R73	0x49003F
R72	0x480001
R71	0x470081
R70	0x46C350
R69	0x450000
R68	0x4403E8
R67	0x430000
R66	0x4201F4
R65	0x410000
R64	0x401388
R63	0x3F0000
R62	0x3E0322
R61	0x3D00A8
R60	0x3C0000
R59	0x3B0001
R58	0x3A9001
R57	0x390020
R56	0x380000
R55	0x370000
R54	0x360000
R53	0x350000
R52	0x340820
R51	0x330080
R50	0x320000
R49	0x314180
R48	0x300300
R47	0x2F0300
R46	0x2E07FC
R45	0x2DC0DF
R44	0x2C1FA3
R43	0x2B0000
R42	0x2A0000
R41	0x290000
R40	0x280000
R39	0x272400
R38	0x2600F4
R37	0x250404
R36	0x240198
R35	0x230004
R34	0x220000
R33	0x211E21
R32	0x200393
R31	0x1F43EC
R30	0x1E318C
R29	0x1D318C
R28	0x1C0488
R27	0x1B0002
R26	0x1A0DB0
R25	0x190C2B
R24	0x18071A
R23	0x17007C
R22	0x160001
R21	0x150401
R20	0x14E048
R19	0x1327B7
R18	0x120064
R17	0x11012C
R16	0x100080
R15	0x0F064F
R14	0x0E1E70
R13	0x0D4000
R12	0x0C5001
R11	0x0B0018
R10	0x0A10D8
R9	0x091604
R8	0x082000
R7	0x0740B2
R6	0x06C802
R5	0x0500C8
R4	0x040A43
R3	0x030642
R2	0x020500
R1	0x010808
R0	0x00A41C

测试结果:

问题:

1.为什么没有禁用输出会有20us的无频率时间?

2.配置是否正确?

3.这样的波形是否正确?

  • 您好,我看了下您的TICSpro的配置,看起来没什么问题, 但是鉴相频率是否可以调大一点,或者如果20MH在的鉴相频率,相位调制可以改成1阶。 这块芯片手头上暂时没有demo可以实验,所以可以尝试将鉴相器频率调大,比如100Mhz再验证下波形。