Datenblatt-Suchmaschine für elektronische Bauteile |
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LA1867NM Datenblatt(PDF) 3 Page - Sanyo Semicon Device |
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LA1867NM Datenblatt(HTML) 3 Page - Sanyo Semicon Device |
3 / 32 page Continued from preceding page. Block Functions 1. FM-IF • IF-limiter amplifier • S-meter outputs (three systems) • Quadrature detector • AF preamplifier • AFC output • Muting circuit (band mute, weak input mute, soft mute) • Control pins (SD, muting attenuation, soft mute on level) • SD output • IF counter buffer output • S-meter output shifter 2. Noise canceller • Built-in high-pass filter • Built-in low-pass filter delay circuit • Noise AGC • Pilot signal compensation circuit • Noise reduction setting pin • Noise canceller off in AM mode function • High-pass filter “fc” control pin No. 4619-3/32 LA1867NM Parameter Symbol Conditions Rating Unit min typ max [FM BLOCK] VSMFM-1 No input, pin 32 DC output, 0.0 0.1 0.3 V non-mod, SW-2 open VSMFM-2 50 dBµ, pin 32 DC output, 1.0 2.1 3.3 V Signal meter output non-mod, SW-2 open VSMFM-3 70 dBµ, pin 32 DC output, 2.3 3.5 5.3 V non-mod, SW-2 open VSMFM-4 100 dBµ, pin 32 DC output, 4.7 6.0 6.7 V non-mod, SW-2 open Muting bandwidth BW-Mute 100 dBµ, The bandwidth when V23 = 2 V, 110 190 290 kHz non-mod Muting drive output VMute-100 100 dBµ, pin 23 DC output, non-mod 0.00 0.03 0.20 V [N.C BLOCK] Noise Canceller Input (pin 20), PG1 f = 1 kHz, 1 µs, with a 100 mV p-o pulse tGATE1 input, the time for V40 to become 1 V 35 55 75 µs or higher Gate time f = 1 kHz, 1 µs, with a 100 mV p-o pulse tGATE2 input, with the MRC pin 15 input = 1 kHz, 10 25 40 µs 30 mV rms With a 1 kHz signal such that the noise Noise sensitivity SN canceller operation is on, the 1 µs pulse 50 75 mVp-o input level, measure pin 20. [Multipath suppression circuit] MRC Input (AC1) MRC output VMRC V18 = 2 V, 1 kHz, 5 mV rms, the pin 1.75 1.85 1.95 V 12 voltage when there is a pin 15 input MRC operating level MRC-ON V18 = 2 V, the pin 15 input level such 15 30 mVrms that V12 becomes 1.75 V |
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