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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STA333BW датащи(PDF) 32 Page - STMicroelectronics |
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STA333BW датащи(HTML) 32 Page - STMicroelectronics |
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32 / 68 page  Register description STA333BW 32/68 DocID13773 Rev 5 Max power correction Setting the MPC bit turns on special processing that corrects the STA333BW power device at high power. This mode should lower the THD+N of a full FFX system at maximum power output and slightly below. If enabled, MPC is operational in all output modes except tapered (OM[1,0] = 01) and binary. When OCFG = 00, MPC has no effect on channels 3 and 4, the line-out channels. Noise-shaper bandwidth selection AM mode enable STA333BW features a FFX processing mode that minimizes the amount of noise generated in frequency range of AM radio. This mode is intended for use when FFX is operating in a device with an AM tuner active. 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. PWM speed mode Table 36. Max power correction Bit R/W RST Name Description 1R/W 1 MPC 0: function disabled 1: enables power bridge correction for THD reduction near maximum power output. 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 |
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