op=ip*gain sysphs der(x)=(1/a)*ip-(1/a)*x sysphs op=x sysphs op=(ip1+ip2)/2 sysphs output=amp*sin(2*3.14*time)+3*sin(3.14*time)+10*sin(2*time) sysphs scope=input sysphs der(x)=(1/a)*ip-(1/a)*x sysphs op=ip-x sysphs