您好问下,单独调试tpl0501,用万用表量W和H两端电阻阻值有变化,但tpl0501的H接DRV612的GAIN引脚,tpl0501的W接地,不能控制DRV612运放的输出增益。DRV612的GAIN接固定电阻可以控制增益输出。
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