This a high-precision signal source, it is possible to achieve a sine wave, controlled duty cycle square wave amplitude and frequency can be adjusted physical code. Absolutely feasible.

高精度单片机频率计的设计\元器件.txt
........................\测信号周期法\1602_Drive.h
........................\............\Backup Of FreqTest.DBK
........................\............\FreqTest.c
........................\............\FreqTest.DSN
........................\............\FreqTest.hex
........................\............\FreqTest.lnp
........................\............\FreqTest.ls1
........................\............\FreqTest.LST
........................\............\FreqTest.M51
........................\............\FreqTest.OBJ
........................\............\FreqTest.Opt
........................\............\FreqTest.plg
........................\............\FreqTest.PWI
........................\............\FreqTest.Uv2
........................\............\FreqTest_Opt.Bak
........................\............\FreqTest_Uv2.Bak
........................\............\Last Loaded FreqTest.DBK
........................\............\原理图.JPG
........................\............\时序图.JPG
........................\计跳沿次数法（高精度）\1602.JPG
........................\......................\1602_Drive.h
........................\......................\Backup Of FreqTest.DBK
........................\......................\Backup of freqtest.Sch
........................\......................\FreqTest
........................\......................\freqtest.Bkp
........................\......................\FreqTest.c
........................\......................\freqtest.ddb
........................\......................\FreqTest.DSN
........................\......................\FreqTest.hex
........................\......................\FreqTest.lnp
........................\......................\FreqTest.ls1
........................\......................\FreqTest.LST
........................\......................\FreqTest.M51
........................\......................\FreqTest.OBJ
........................\......................\FreqTest.Opt
........................\......................\FreqTest.plg
........................\......................\FreqTest.PWI
........................\......................\FreqTest.Uv2
........................\......................\FreqTest_Opt.Bak
........................\......................\FreqTest_Uv2.Bak
........................\......................\Last Loaded FreqTest.DBK
........................\......................\Previous Backup of freqtest.Sch
........................\......................\yulitu.JPG
........................\......................\时序图.JPG
........................\高精度单片机频率计的设计.doc
........................\测信号周期法
........................\计跳沿次数法（高精度）
高精度单片机频率计的设计

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