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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STA369BW датащи(PDF) 43 Page - STMicroelectronics |
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STA369BW датащи(HTML) 43 Page - STMicroelectronics |
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43 / 88 page  STA369BW Register description Doc ID 022033 Rev 1 43/88 7.5.3 Noise-shaper bandwidth selection 7.5.4 AM mode enable The STA369BW features an FFX processing mode that minimizes the amount of noise generated in the frequency range of AM radio. This mode is intended for use when FFX is operating in a device with an active AM tuner. The SNR of the FFX processing is reduced to approximately 83 dB in this mode, which is still greater than the SNR of AM radio. 7.5.5 PWM speed mode 7.5.6 Distortion compensation variable enable 7.5.7 Zero-crossing volume enable The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital zero-crossings, no clicks are audible. Table 37. Noise-shaper bandwidth selection Bit R/W RST Name Description 2 R/W 0 NSBW 1: Third order NS 0: Fourth order NS Table 38. AM mode enable Bit R/W RST Name Description 3R/W 0 AME 0: Normal FFX operation. 1: AM reduction mode FFX operation Table 39. PWM speed mode Bit R/W RST Name Description 4R/W 0 PWMS 0: Normal speed (384 kHz) all channels 1: Odd speed (341.3 kHz) all channels Table 40. Distortion compensation variable enable Bit R/W RST Name Description 5R/W 0 DCCV 0: Use preset DC coefficient 1: Use DCC coefficient Table 41. Zero-crossing volume enable Bit R/W RST Name Description 6R/W 1 ZCE 1: Volume adjustments only occur at digital zero-crossings 0: Volume adjustments occur immediately |
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