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參數(shù)資料
| 型號： | LA4587 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Tuning Fork Crystal; Frequency:32.768kHz; Crystal Terminals:Radial Leaded; ESR:35kohm; Leaded Process Compatible:No; Mounting Type:Through Hole; Peak Reflow Compatible (260 C):No; Number of Pins:2 |
| 中文描述： | 前置放大器功率放大器為1.5 V耳機(jī)音響 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 342K |
| 代理商： | LA4587 |
Operation Descprition
.
Low boost system
.
Note on low boost
The signals that are applied to each power input are mixed and then passed through a two-stage LPF. Because the signal levels
are attenuated by the LPF, level compensation is accomplished by amplifying the signals through a low boost amplifier located
in between. The phase of signals that pass through the secondary LPF is inverted relative to the input signal; these signals are
then input to each power amplifier.
.
Note on channels 1 and 2
The positive phase signals that were input from the positive (‘‘+’’) input pins and the reverse phase signals that were input from
the negative (‘‘–’’) input pins and then were passed through the secondary LPF are all input, amplified, and then output.
.
Note on the common amplifier
The phase of the signals that passed through the secondary LPF is inverted by the inverting amplifier; the signals (with reversed
phases relative to channels 1 and 2) are then input to the negative (‘‘–’’) inputs. The positive (‘‘+’’) input signals are grounded
to V
REF
, amplified by the inverting amplifier and then output.
The phase of the channel 1 and 2 amplifier outputs and the common amplifier outputs are made to oscillate with inverted
phases, making it possible to obtain the dynamic range efficiently.
Low-frequency region amplification: 12 dB/oct, high-frequency region amplification: 6 dB/oct.
Phase 90°
Phase 180°
LA4587M
No.5204-10/18
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA4587M | Tuning Fork Crystal; Frequency:32.768kHz; Frequency Tolerance:+/- 20 ppm; Load Capacitance:12.5pF; Crystal Terminals:PCB Surface Mount; ESR:50kohm; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Number of Pins:4 |
| LA4589 | 1.5V Stereo Headphone Preamplifier and Power Amplifier |
| LA4589W | XTAL, 32.768 KHZ SURFACE MOUNT WATCH CRYSTAL |
| LA4590W | XTAL, 32.768KHZ 30PPM 12 P |
| LA4592W | 1.5-V Preamplifier + Power Amplifier for Headphone Stereo Products |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA4587M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Preamplifier + Power Amplifier for 1.5 V Headphone Stereos |
| LA4589 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1.5V Stereo Headphone Preamplifier and Power Amplifier |
| LA4589W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1.5V Stereo Headphone Preamplifier and Power Amplifier |
| LA4590W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1.5V Stereo Headphone Preamplifier and Power Amplifier |
| LA4592W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1.5-V Preamplifier + Power Amplifier for Headphone Stereo Products |
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