R1 = 1e3;
R2 = 1e3;
C1 = 0.032e-6;
C2 = 0.032e-6;
fmin=1;
fmax=1e6;

plotq(R1,R2,C1,C2,fmin,fmax);

function plotq(R1,R2,C1,C2,fmin,fmax)
    h=0.01;
    x = fmin:h:fmax;
    y = 20*log(abs((1/(R1*R2*C1*C2))./(((1j*2*pi*x).^2)+((1j*2*pi*x)*((1/(R1*C1))+((1/(R2*C1))+(1/(R2*C2)))))+(1/(R1*R2*C1*C2)))));

    figure
    semilogx(x,y)
end