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MSRAAF - Resistor Programmable Active Audio Filter
https://mix-sig.com/index.php/msraaf-resistor-programmable-active-audio-filter
The resistor programmable continuous audio active filter IC is a CMOS chip that can be configured for either a lowpass, bandpass, highpass, allpass or notch filter. Butterworth, Bessel, elliptic and Chebyshev filters can be implemented. The frequency range covers the audio spectrum to 20 kHz. There is a low power version with a frequency range to 5kHz.
MAX263 Pin-Programmable Universal and Bandpass …
https://www.maximintegrated.com/en/products/analog/analog-filters/MAX263.html
Filter Type : Universal: Filter Sections : 2: Order Per Filter Section : 2: Highest Cutoff (kHz) (min) 57: Lowest Cutoff (Hz) (max) 0.4: Filter Class : Switched Cap: Filter Characteristic : Programmable: Program Method : Pin Strap: Oper. Temp. (°C)-55 to +125-40 to +85 0 to +70: Package/Pins : PDIP/28 SOIC (W)/28: Budgetary Price (See Notes) 16.11
Microprocessor Programmable Universal Active Filters
https://www.maximintegrated.com/en/products/analog/analog-filters/MAX262.html
Description. The MAX260/MAX261/MAX262 CMOS dual second-order universal switched-capacitor active filters allow microprocessor control of precise filter functions. No external components are required for a variety of bandpass, lowpass, highpass, notch, and allpass configurations. Each device contains two second-order filter sections that place center …
MAX268 Pin-Programmable Universal and Bandpass …
https://www.maximintegrated.com/en/products/analog/analog-filters/MAX268.html
Filter Type : Bandpass: Filter Sections : 2: Order Per Filter Section : 2: Highest Cutoff (kHz) (min) 140: Lowest Cutoff (Hz) (max) 1: Filter Class : Switched Cap: Filter Characteristic : Programmable: Program Method : Pin Strap: Oper. Temp. (°C)-55 to +125-40 to +85 0 to +70: Package/Pins : PDIP/24 SOIC (W)/24: Budgetary Price (See Notes) 0
TLV320ADCx140 Programmable Biquad Filter …
https://www.ti.com/lit/an/sbaa378a/sbaa378a.pdf
The TLV320ADCx140 devices supports up to three programmable Digital Biquad Filters in the signal chain of each channel shown in Figure 1 and , respectively. The programmable Biquad Filters lie between the Digital Summer and the Digital Volume Control blocks. The Biquad Filters allow for custom low-pass, high-
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