lab3_finalreport - Purpose Interface board n Embedded board...

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Unformatted text preview: Purpose Interface board n Embedded board n digital storage oscilloscope n PGA(Programmable Gain Amplifier) z ~ . n PGA & ~ signal z< ~ ¡ ¡ oscilloscope signal e n ¡ channel 1 signal n . z< ¡ signal ~ ¡ , z< ¡ range signal , z * ¡ ¡ ¡ ¡ . 1) Show and analysis the experiment results. ~ ~ K ~ . 1 < ~ ¡ op amp ¡ ¡ O. n feedback loop K 6 ¡ ¡ * h 6 n gain * . stage op amp gain n-1 n, -2.5 n-5 n, -10 < ~ stage op amp-1 n-10 ¡ O . ) ü “ ¡ op amp gain n 1 n, 2.5 n, 5 n, 10 n, 25 n, 50 n, 100 e ¡ ¡ ¡ O . ¡ ¡ ¡ O voltage division z < ~ software n input O ‚ GPIO “ ~ hardware z ~ ¡ ¡ . n voltage division h6 t ¡ T ¢ l £ * . 2 ¤ * ‚ A . input gain Output-10mV ~ +10mV 100-1V ~ +1V-20mV ~ +20mV 50-40mV ~ +40mV 25-100mV ~ +100mV 10-200mV ~ +200mV 5-400mV ~ +400mV 2.5-1V ~ +1V 1 z< ~ ¥ ‚ . Cutoff frequency e 180kHz ) ~ . ¡ O 100kHz ) ¡ 1 < * . 2) Explain the code briefly K ~ h * . 1 ~ . <gpio.h> #define GPIO_GAIN_SETLECT1_1 23 // ) ~ . n 1stage opamp n 23 n #define GPIO_GAIN_SETLECT1_2 24 // 24 O 2stage opamp n 25 n ¡ #define GPIO_GAIN_SETLECT2 25 // ) ....
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This note was uploaded on 04/08/2010 for the course EE EE405 taught by Professor Bkkim during the Spring '10 term at 카이스트, 한국과학기술원.

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lab3_finalreport - Purpose Interface board n Embedded board...

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