= butter( 3, 2 * pi *input.wnom, 's ') % 3rd order = butter( 1, 2 * pi *wTIA, 's ') % 1st order % Define the analog filters (for design purpose) Input.wnom = double( calculate_rfbw(input.PLL_rate, input.caldiv, input.RxTx, true)) % support a simple data rate input otherwise it must be a structure % delay = actual delay used in phase equalizationįunction output = internal_design_filter( input) % Astop_actual = actual stopband attentuation % filter = system object for visualization (does not include analog filters) % Outputs (structure containing the following fields) % phEQ = phase equalization on (not -1)/off (-1)

% FIRdBmin = min rejection that FIR is required to have (in dB) % Astop = min attenuation in stopband (in dB) % Apass = max ripple allowed in passband (in dB) % FIR = FIR interpolation/decimation factor % Rdata = input/output sample data rate (in Hz) % Inputs (structure containing the following fields) % THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. % STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF % BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, % RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE, DATA, OR PROFITS OR % EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY % IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, % INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A % THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, % resulting from the use of this software, must be connected to, run % - Use of the software either in source or binary form or filter designs % from the requirement that you obtain separate licenses from these % - The use of this software may or may not infringe the patent rights % from this software without specific prior written permission. % contributors may be used to endorse or promote products derived % - Neither the name of Analog Devices, Inc. % the documentation and/or other materials provided with the % notice, this list of conditions and the following disclaimer in % - Redistributions in binary form must reproduce the above copyright % notice, this list of conditions and the following disclaimer. % - Redistributions of source code must retain the above copyright

Analog devices filter design