Input | Output | Supply | |||
---|---|---|---|---|---|
ViMin | ViMax | VoMin | VoMax | Vcc | Vee |
–2.45V | +2.45V | 0.05V | 4.95V | 5V | 0V |
Gain | Low Cutoff Frequency (fl) | High Cutoff Frequency (fh) | Vref |
---|---|---|---|
1V/V | 1kHz | 10kHz | 2.5V |
Design Description
This circuit is a single-supply, 2nd-order Sallen-Key (SK) band-pass (BP) filter. It is designed by cascading an SK low-pass filter and an SK high-pass filter. Vref provides a DC offset to accommodate for a single supply.
Design Notes
Design Steps
This BP filter design involves two cascaded filters, a low-pass (LP) filter and a high-pass (HP) filter. The lower cutoff frequency (fl) of the BP filter is 1kHz and the higher cutoff frequency (fh) is 10kHz. The design steps show an LP filter design with fh of 10kHz and an HP filter design with fl of 1kHz. See the SK LP filter design and SK HP filter design in the circuit cookbook for details on transfer function equations and calculations.
LP Filter Design
HP Filter Design
Design Simulations
AC Simulation Results
Transient Simulation Results
The following image shows a filter output in response to a 5Vpp, 100Hz input signal (gain = 0.01V/V).
The following transient
simulation result shows a filter output in response to a 5Vpp, 5kHz input
signal
(gain = 1V/V).
The following image shows a filter output in response to a 5Vpp, 100kHz input signal (gain = 0.01V/V).
Design References
Design Featured Op Amp
TLV9062 | |
---|---|
Vss | 1.8V to 5.5V |
VinCM | Rail-to-Rail |
Vout | Rail-to-Rail |
Vos | 0.3mV |
Iq | 538µA |
Ib | 0.5pA |
UGBW | 10MHz |
SR | 6.5V/µs |
# of Channels | 1, 2, 4 |
www.ti.com/product/TLV9062 |
Design Alternate Op Amp
Parametric Search | |
---|---|
Vss | 5V |
VinCM | Rail-to-Rail |
Vout | Rail-to-Rail |
UGBW | 1MHz |
SR | > 5V/µS |
# of Channels | 2 |
www.ti.com/parametricsearch |