Moteur de recherche de fiches techniques de composants électroniques |
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BA7726 Fiches technique(PDF) 8 Page - Rohm |
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BA7726 Fiches technique(HTML) 8 Page - Rohm |
8 / 11 page 8 Multimedia ICs BA7726AS / BA7726AFS •Circuit operation (1) MUTE CTRL (pin 4) • Controls line muting. 2) L / ST / R CTRL (pin 32) • Controls LINE OUT output in the NORMAL mode. (2) OUTPUT CTRL (pins 3, 31, 32) • LINE OUT output is controlled with pins 3, 31 and 32. (Microphone mixing is controlled with pin 11.) 1) NO / VC CTRL (pin 31) • Used to select the NORMAL and VOCAL CUT modes. LH MUTE MUTE VMUTE (4pin) LH NORMAL NORMAL : Normal output mode. Controlled by pin 32. VOCAL CUT : Used to erase or attenuate vocals in multiplexed karaoke recordings and normal stereo music recordings. Controlled by pin3. VOCAL CUT VNOVC (31pin) VLSTR (32pin) L M (OPEN) H LEFT STEREO RIGHT RIGHT : LINE IN R input is output to LINE OUT L / R. STEREO : LINE IN L / R input is output to LINE OUT L / R without modification LEFT : LINE IN L input is output to LINE OUT L / R. 3) L / VF / R CTRL (pin 3) • Controls LINE OUT output in the VOCAL CUT mode. RIGHT : For recordings in which the right channel is karaoke and the left channel is for vocals (with karaoke). LEFT : For recordings in which the left channel is karaoke and the right channel is for vocals (with karaoke). VLVFR (3pin) L M (OPEN) H LEFT RIGHT VOCAL FADER : Attenuates the vocals from normal stereo recordings. VOCAL FADER ∗ When Vnovc = L, V LVFR = DON ' T CARE When Vnovc = H, VLSTR = DON ' T CARE (3) ECHO LEVEL CTRL and MIC ON / OFF SW (pin 11) • Between Vcc and 0.2 × Vcc: Controls echo signal mixing ratio Between Vcc and GND : Turns microphone input sound (pin 26) to LINE OUT on and off VCC ~ 0.2 × VCC 0.1 × VCC ~ GND VECHO (11pin) MIC ON and ECHO LEVEL CTRL MIC OFF – 100 0 – 50 0 0.5 1.0 VECHO (11pin) P.P ratio : VECHO / VCC MIC AMP IN ~ LINE OUT (VIN = – 38dBV, f = 1kHz) DLY BF IN ~ LINE OUT (VIN = – 4dBV, f = 1kHz) Fig. 2 LINE OUTattenuation ratio vs. Vecho (11pin) partial pressure ratio ∗ These figures are for standard samples and are not guaranteed standards. (4) LOOP GAIN CTRL (pin 12) • Adjusts the loop gain (pins 17 and 18). 0 0 0.5 1.0 VCC = 9.0V –50 –25 VLOOP (12pin) P.P ratio : VECHO / VCC DLY BF IN ~ CMP BF OUT (VIN = – 4dBV, f = 1kHz) Fig. 3 CMP BF OUT attenuation ratio vs. Vloop (pin 12) partial pressure ratio ∗ These figures are for standard samples and are not guaranteed standards. |
Numéro de pièce similaire - BA7726 |
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Description similaire - BA7726 |
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