{"product_id":"low-voltage-microphone-preamplifier-with-variable-compression-and-noise-canceling","title":"Low Voltage Microphone Preamplifier with Variable Compression and Noise Canceling","description":"\u003cp\u003eThis is a complete\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emicrophone\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esignal conditioning project. Designed primarily for voice-band applications, this project provides amplification, limiting, variable compression, and noise gate. User-adjustable compression ratio, noise gate threshold, and two different fixed gains optimize circuit operation for a variety of applications.\u003c\/p\u003e\n\u003cp\u003eThis is a complete and flexible solution for conditioning condenser microphones for personal electronics and computer audio systems. It is also excellent for improving vocal clarity in communications and the public address systems. A low noise voltage-controlled amplifier (VCA) provides a gain that is dynamically adjusted by a control loop to maintain a set compressions characteristic.  The compression ratio is set by a jumper and can be varied from 1:1 to over 10:1 relative to the fixed rotation point. Signals above the rotation point are limited to prevent overload and eliminate popping.\u003c\/p\u003e\n\u003cp\u003eA downward expander (noise gate) prevents the amplification of background noise or hum. This results in an optimized signal level prior to digitization, thereby eliminating the need for additional gain or attenuation in the digital domain. The flexibility of setting the compression ratio and the time constant of the level detector, coupled with two values of rotation point, make the\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eSSM2167\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eeasy to integrate into a wide variety of microphone conditioning applications.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Supply 3.3V DC\u003c\/li\u003e\n\u003cli\u003eOn Board Condenser Microphone\u003c\/li\u003e\n\u003cli\u003eOn Board Power LED\u003c\/li\u003e\n\u003cli\u003eJumpers to Set Various Noise Gate (J7, J8, J9, J10)\u003c\/li\u003e\n\u003cli\u003eJumpers to Set Various Compression Ratio (J2, J3, J4, J5)\u003c\/li\u003e\n\u003cli\u003eJumper J1 for Biasing Voltage to Microphone, Open if Biasing Supply not Required\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 51.12 x 16.35 mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47037823058092,"sku":"A120","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/A120A.jpg?v=1787573993","url":"https:\/\/dotfry.com\/products\/low-voltage-microphone-preamplifier-with-variable-compression-and-noise-canceling","provider":"dotfry","version":"1.0","type":"link"}