Internal Circuitry of 741 Type Op-amp
Though designs vary between products and manufacturers, all op-amps have basically the same internal structure, which consists of three stages:
- Differential amplifier — provides low noise amplification, high input impedance, usually a differential output.
- Voltage amplifier — provides high voltage gain, a single-pole frequency roll-off, usually single-ended output.
- Output amplifier — provides high current driving capability, low output impedance, current limiting and short circuit protection circuitry.
IC op-amps as implemented in practice are moderately complex integrated circuits. A typical example is the ubiquitous 741 op-amp designed by Dave Fullagar in Fairchild Semiconductor after the remarkable Widlar LM301. Thus the basic architecture of the 741 is identical to that of the 301.
Read more about this topic: Operational Amplifier
Famous quotes containing the words internal and/or type:
“If the Revolution has the right to destroy bridges and art monuments whenever necessary, it will stop still less from laying its hand on any tendency in art which, no matter how great its achievement in form, threatens to disintegrate the revolutionary environment or to arouse the internal forces of the Revolution, that is, the proletariat, the peasantry and the intelligentsia, to a hostile opposition to one another. Our standard is, clearly, political, imperative and intolerant.”
—Leon Trotsky (1879–1940)
“To be a real philosopher all that is necessary is to hate some one else’s type of thinking.”
—William James (1842–1910)