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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8750CLSEFL/R датащи(PDF) 39 Page - Wolfson Microelectronics plc |
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WM8750CLSEFL/R датащи(HTML) 39 Page - Wolfson Microelectronics plc |
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39 / 65 page  Production Data WM8750L w PD, Rev 4.4, August 2012 39 SPEAKER OUTPUT LOUT2 and ROUT2 can differentially drive a mono 8 speaker as shown below. LOUT2 ROUT2 WM8750L ROUT2INV = 1 V SPKR = L-(-R) = L+R -1 LEFT MIXER RIGHT MIXER ROUT2VOL LOUT2VOL Figure 14 Speaker Output Connection The right channel is inverted by setting the ROUT2INV bit, so that the signal across the loudspeaker is the sum of left and right channels. LINE OUTPUT The analogue outputs, LOUT1/ROUT1 and LOUT2/ROUT2, can be used as line outputs. Additionally, OUT3 and MONOOUT can be used as a stereo line-out by setting OUT3SW=11 (reg. 24) and ensuring the contents of registers 38 and 39 (mono-out mix) are the same as reg. 34 and 35 (left out mix). Recommended external components are shown below. AGND AGND LINE-OUT SOCKET (LEFT) C1 1uF R1 100 Ohm LOUT1/2 or OUT3 (OUT3SW=11) ROUT1/2 or MONOOUT WM8750L R2 100 Ohm LINE-OUT SOCKET (RIGHT) C2 1uF Figure 15 Recommended Circuit for Line Output The DC blocking capacitors and the load resistance together determine the lower cut-off frequency, fc. Assuming a 10 kOhm load and C1, C2 = 1 F: fc = 1 / 2 (RL+R1) C1 = 1 / (2 x 10.1k x 1F) = 16 Hz Increasing the capacitance lowers fc, improving the bass response. Smaller values of C1 and C2 will diminish the bass response. The function of R1 and R2 is to protect the line outputs from damage when used improperly. |
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