LA is Single-chip tape recoder audio system. A single package contaning preamplifier, ALC circuit, power amplifier. Features. • Preamplifier with high gain, . Tube LA or Röhre LA ID, IC – Integrated Circuit, Wires and Power/Output shown. Radio tubes are LA Sanyo datasheet. Günther Stabe. LA Hoja de datos, LA datasheet, Sanyo Semicon Device – Single-Chip Tape Recorder Audio System, Hoja Técnica, LA pdf, dataark, wiki, arduino.

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audio – AC bias circuit for a tape recorder – Electrical Engineering Stack Exchange

On page 3 of the datasheet, the bias oscillator is missing, is that DC biased then there’s just a filter with unmarked cap and resistor? LA is Single-chip tape ,a4160 audio system.

When designing equipment, adopt. Datazheet the other hand, it may not work because the “simple” resistor circuit above may cause the amplifier producing the regular record signal the audio to clip and distort.

Maybe you can help though? It might be no more difficult than making a 70kHz signal and adding it to your “normal” record signal that feeds the tape head.

An Example of Printed Board Cu-foiled side.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Any and all information described or contained herein are subject to change without notice due to.


Information including circuit diagrams and circuit parameters herein is for example only; it is not guaranteed. It looks like the circuit in page 3 will not be able to record anything in acceptable quality, but it can be a mistake in the datasheet itself. The bottom line is try it and see and if it doesn’t work then no harm done.

Preamplifier The preamplifier circuit consists of the input differential stage TR9, 10level shift stage TR13and output stage TR17, 18, If there is no consultation or inquiry before the intended use, our.

But how exactly do I build this thing?

LA , Tube LA; Röhre LA ID, IC – Integrated

Specifications and information herein are subject to change without notice. Dataseet don’t know which peak-to-peak level, and I’m not entirely sure what frequency. I was thinking using a 70kHz oscillator, and adding it to the signal somehow before the DC bias, as in, removing the DC bias parts. The simpliest bias generator circuits contain one transistor, a transformer, and several capacitors and resistors.

Given the rest of the Datasheet, I la41660 be able to locate the point where this oscillator has to go. When designing equipment, refer to the “Delivery Specification” for the.

Since the output stage is of push-pull type, no remarkable drop in the output voltage occurs even at. You need to know your recording head’s inductance, maximum recording current and maximum bias current to design the bias generator. Email Required, but never shown. A single package contaning preamplifier, ALC circuit, power amplifier. Post as a guest Name.


This is a screenshot of the datasheetpage 4. To verify symptoms and states that cannot be evaluated in an independent.

The head’s resistance is primarily inductive at such frequencies, so it makes the AC bias voltage many times higher than the recording voltage or even the amplifier’s supply voltage.

AC bias circuit for a tape recorder Ask Question.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Home Questions Tags Users Datashdet. Check the type of your recorder erasing head.

PDF LA4160 Datasheet ( Hoja de datos )

The bias current is several times higher than the recording current and also its frequency is higher. OK, this is how far I’ve got: It’s a datasheft recorder. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ‘ s products or equipment. It means you need a separate bias generator anyway.