selektor 1976-02

A monolithic temperature-stabilized voltage-reference IC, which out-performs standard zener diodes by a factor of The ultimate goal of the record manu-facturing process outlined in figure 1 is that the output signal at B should sound identical to the output signal from the mixing console (A). The tape recorder which forms part of the recording chain should therefore ideally produce an output signal that is identical to the original input signal. However, an ordinary tape recorder records the music waveform on the tape as analogous variations in magnetic field strength. The non-linear distortion, modulation noise and other tape noise introduced by this system limit the dynamic range drastically. In practice, the signal-to-noise ratio is only 50 ... 55 dB. It is difficult to achieve any real improvement by `normal` means. 20, has been developed by National Semiconductor Corp.