Compared　to　conventional　wired　pacemakers,　leadless　pacemakers　reduce　the　risk　of　infection　and　other　risks　associated　with　wires　and　enhance　safety.　Intracardiac　conduction　communication,　with　its　low　power　consumption,　high　stability,　and　security,　is　more　suitable　than　radio　frequency　transmission　for　communication　between　pacemakers　in　different　heart　chambers.　Super-regenerative　circuits,　with　their　simple　architecture　and　low　power　consumption　characteristics,　are　well　suited　for　wireless　pacemaker　receiver　circuits.　However,　due　to　the　effect　of　channel　attenuation　fluctuation,　the　intracardiac　signal　strength　received　by　the　super-regenerative　circuit　fluctuates　greatly,　and　additional　circuits　are　needed　at　the　receiving　end　to　stabilize　the　amplitude　fluctuation　of　the　signal.　In　this　paper,　a　super-regenerative　receiver　circuit　based　on　amplitude　adaptive　technique　is　designed.　Its　front-end　circuit　uses　adaptive　technology　to　adjust　the　output　amplitude　of　the　input　signal,　and　the　back-end　circuit　uses　the　super-regenerative　technology　to　demodulation　the　baseband　signal.　Experimental　results　show　that　the　output　voltage　of　the　adaptive　circuit　is　stabilized　at　about　1　V　when　the　amplitude　of　the　transmitted　signal　is　between　2　mV　and　10mV.　The　adaptive　receiver　circuit　maintains　a　lower　bit　error　rate　compared　to　the　super-regenerative　receiver　circuit　at　all　transmission　rates.　At　the　same　time,　under　different　conditions　of　input　power　and　data　transmission　rate,　the　time　delay　of　the　adaptive　receiver　circuit　can　be　controlled　within　120　μs.　©　2025　IEEE.