Lowpass Filters are used in applications that require low frequencies to be passed while attenuating higher out of band frequencies.
TTE lowpass filters are available for any -3dB frequency from 100 Hz to 4 GHz. For frequencies above or below that range please contact TTE for assistance.
LOWPASS FILTER FORMULAS:
This example uses the delay date for the LT10-144kHz-50.
To calculate the delay at 50% of the cut-off frequency we find the normalized delay is 5.5Div below the reference of 572mS. Each division of 0.5mS. Thus, the normalized delay is 572mS minus 2.75mS. Which is 569.3mS at 72kHz. The cut-off frequency is 144kHz.
Delay = (Time in seconds)/Fc – Cut-off Frequency)
TTE offers its passive filters in the smallest practical sizes available; PCB, SMT or connectorized (BNC or SMA) cases are typically utilized, depending on the specific filter design.