Analog Circuit Design Laboratory Report - MyWeb at WIT ...

The ideal op-amp generally has 5 terminals, two input terminals (pins 2 and 3),
one output terminal (pin 6), and two power supply terminals (pins 7 and 4), see Figure 1.
Pin 2 is the inverting input terminal while pin 3 is the non-inverting input terminal. The
power supply terminals are typically connected to a positive voltage, VCC= 15V and to a
negative voltage, VEE= -15V, pins 7 and 4 respectively. The characteristics of an ideal
op-amp are that it has an infinite open-loop gain (AOL), an infinite bandwidth (Bwl),
infinite input impedance (Rin), zero output impedance (RO) and zero common-mode gain
(ACM).
When operating in its simplest form, displayed in Figure 1, with RL equal to 10-
kΩ (typ), the voltage output of the op-amp is equivalent to the positive or negative
saturation voltage. The saturation voltage (Vsat) can be calculated by:
+ sat = CC −1
V V or 1 + = sat EE V V Eq. (1)
The supply current (Isupply), at pins 7 and 4 is determined by the supply manufacturer’s
specification and ranges from a few milliamps for older products to mega-amps for
today’s new technology. Using Kirkoff’s current law Isupply(+) is equal to Isupply(-) plus the
output current of the op-amp read c′-c, see Figure 1.
I +
sup ply = I ply − I
( + ) sup ( ) o
Eq. (2)
3