... semilogx(f,abs(h(1,:)),'w',f,abs(h(2,:)),'w',f,abs(h(3,:)),'w') title('Op Amp Frequency Characteristics') xlabel('Frequency, Hz') ylabel('Gain') axis([1.0e-2,1.0e10,0,1200]) ... operational amplifiers, w1 is very small (approx. 20π radians /s) and w2 might be in the range of 2 to 6 mega-radians/s. Example 11.4 The constituent parts of an operational amplifier ... semilogx(f,abs(h1),'w',f,abs(h2),'w',f,abs(h3),'w') xlabel('Frequency, Hz') ylabel('Gain') axis([1.0e-2,1.0e6,0,260]) text(5.0e-2,35,'R2...