N-Channel MOSFET with wide ohmic region

as projects have become more involved, have  branched out making digital circuits interfacing , designing analog circuits, still neophyte in analog.  @ moment,   i trying design audio amplifier automatic gain control, using opamp peak detector output fed n-channel mosfet operating in ohmic region.   i prefer particular circuit wide ohmic region  (i.e., gate voltage excursion turnoff near saturation).   using simulation,  found bsd214 n-channel mosfet has 1.2 volts of gate voltage variation across ohmic region,  not readily available except in quantities, , in sot-23 package.  other transistors have simulated show narrower ohmic regions.

so, if familiar n-channel mosfet 1 v. or more ohmic region, available in small quantities , in standard thru-hole package, i'd sure appreciate suggestion.

thanks in advance help.

john doner

perhaps want transconductance opamp?

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