| 摘要 |
The apparatus comprises a circuit where an input electric signal is connected to a constant pulse duration generator (1), after which there is connected a switch (2) which is connected to a primary current source (3), connected to a supply voltage source (4), and after the switch (2) there is connected one pole of the capacitor (5) and the main constant current load (6). The main constant current load (6) is advantageously connected to the supply voltage source (4). Between the capacitor (5) and the output of the apparatus there is connected the frequency low-pass filter (8). To the apparatus output there may be connected an auxiliary constant current load (7), one pole of which being connected either to the capacitor (5) or between the switch (2) and the primary current source (3). Alternatively, to the apparatus output there may be connected the secondary constant current source (9), one pole of which being connected either to the capacitor (5) or to the switch (2) and to the primary current source (3).
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