|
The SIM965 Analog Filter is ideal for signal conditioning applications
where Bessel or Butterworth filters are needed. Bessel filters offer
clean step response (negligible overshoot) and linear phase response,
while Butterworth filters provide excellent pass-band flatness with
some overshoot. A choice of high-pass or low-pass filtering is selected
from the front panel. Cutoff frequencies are set with 3-digit resolution,
and a choice of 12, 24, 36 or 48 dB/octave rolloff is provided for
either filter type.
The SIM965 accepts input signals between ±5 V, and has unity
gain. Its low noise and low harmonic distortion, along with a bandwidth
of greater than 1 MHz, make it ideal in sensitive analog applications.
If signal amplification is needed, the SIM910 JFET Preamplifier,
or the SIM911 BJT Preamplifier should be considered.
Up to eight SIM965 modules can be housed in one SIM900 mainframe.
Mainframes can be cascaded, allowing an unlimited number of filter
channels for complex applications.
The SIM965 is also fully programmable. All functions can be controlled
from a computer via the SIM900 Mainframe. Both RS-232 and GPIB interfaces
are supported by the mainframe.
|
SIM965 Frequency Response
|
|
|
|
The digital control circuitry in the SIM965 is designed with a
special clock-stopping architecture in which the microcontroller
is turned on only when settings are being changed. This guarantees
that no digital noise can contaminate low-level analog signals.
|
