BA7767AS - VTR Normal audio signal processings

BA7767AS - VTR Normal audio signal processings

FEATURES
• Built-in f_H trap constituted with C, R
• A timing control device is built in for controlling the recording amplifier, head switch and recording blas. No REC MUTE control signal is required
• Built-in power source for the recording blas oscillator, that is built up gradually
• High-voltage withstanding head switcher (AC withstanding voltage: 120V_P-P or above, f = 70kHz)
• Applicable to the 3-mode equalizer of SP/LP/EP
• Built-in high S/N replay preamplifier ( - 122 dBV (Typ.)/Rg = 620R : DIN AUDIO)
• Built-in low distortion factor ALC circuit (0.08% (Typ.)/V_OA = - 6dBV) with variable ALC level for setting
• No shock noise or ALC attack noise is generated when power source is turned ON or the mode is changed, by means of a ALC loop outside mute system
• Extremely low offset voltage upon selecting mute (3mV (Typ.))
• Equipped with control terminals for PB/EE, REC/EE, MUTE, EQ
• A threshold level of 4 V_F (about 2.5V) is set (excluding EQ control)