LMV321M5X National Semiconductor, LMV321M5X Datasheet - Page 15

• Manufacturer Part Number: LMV321M5X
• Description: IC,Operational Amplifier,SINGLE,BICMOS,TSOP,5PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LMV321M5X

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Application Notes
where for all three filters,
A design example for a bandpass filter is shown below:
Assume the system design requires a bandpass filter with f
= 1 kHz and Q = 50. What needs to be calculated are capaci-
tor and resistor values.
First choose convenient values for C
Then from Equation (11) ,
From Equation (12) ,
From the above calculated values, the midband gain is H
R
been added to Figure 15 .
4.5 Pulse Generators and Oscillators
A pulse generator is shown in Figure 16 . Two diodes have
been used to separate the charge and discharge paths to ca-
pacitor C.
3
/R
2
= 100 (40dB). The nearest 5% standard values have
2R2 = R
C
1
= 1200 pF
1
= 30 k
(Continued)
1
, R
1
and R
2
:
(12)
(11)
0
O
=
15
When the output voltage V
pacitor C is charged toward V
across C rises exponentially with a time constant
and this voltage is applied to the inverting input of the op
amp. Meanwhile, the voltage at the non-inverting input is set
at the positive threshold voltage (V
capacitor voltage continually increases until it reaches V
at which point the output of the generator will switch to its
low, V
input is switched to the negative threshold voltage (V
the generator. The capacitor then starts to discharge toward
V
When the capacitor voltage reaches V
pulse generator switches to V
charge, and the cycle repeats itself.
OL
exponentially through R
OL
(=0V in this case). The voltage at the non-inverting
FIGURE 16. Pulse Generator
O
1
is first at its high, V
, with a time constant = R
OH
OH
TH+
. The capacitor starts to
through R
) of the generator. The
TH-
, the output of the
2
DS100060-81
. The voltage
www.national.com
OH
, the ca-
= R
TH-
TH+
) of
2
1
C,
C.
,