slope (current) of the log amps中的slope是啥意思?附原文

where&nbsp;ILA&nbsp;and&nbsp;ISLP&nbsp;are&nbsp;the&nbsp;output&nbsp;current&nbsp;difference&nbsp;and&nbsp;the<br />characteristic&nbsp;slope&nbsp;(current)&nbsp;of&nbsp;the&nbsp;log&nbsp;amps,&nbsp;respectively.&nbsp;The<br />slope&nbsp;is&nbsp;derived&nbsp;from&nbsp;an&nbsp;accurate&nbsp;reference&nbsp;designed&nbsp;to&nbsp;be&nbsp;insensitive&nbsp;to&nbsp;temperature&nbsp;and&nbsp;supply&nbsp;voltage.