| ^^ | | | TA= +250C |
| | 1UU | mA | | | | | | | |
| | | | | | | | | | |
| j | | 50m | A | | | | | |
| | X | | | | | | | | |
| | Nj | | | | | | | |
| | | | N | | | | | | |
| | 10T | iA | | j | | | | | |
| | | | | | -- | | -- | | |
| | | | | | | | | | |
| | | | | | | | | |
The TBA 2800 preamplifier lC contains four main parts: the gain-controlled amplifier l, the amplifier II, the pulse-separating amplifier lIl, and the inverter IV, as shown in Fig. 1 . The ampli- fierlhas awide dynamic range and thus ensures interference- frea operation, also at bright ambient light, 50-Hz-modulated light originating from fluorescent lamps, or at intensive infrared light, e. g. produced by infrared sound transmission. It is also possible, to approach almost directly the remote-control transmitter to th8 receiver without producing misfunction by overdriving the receiver.
