| 摘要 |
<p>A frequency control circuit (11) is coupled to a power source (12) and includes a transformer (43) and a frequency control capacitor (50) for establishing a constant oscillation signal at a predetermined frequency. A switching network (13) oscillation signal. Induction circuitry (15) is coupled to the switching network (13) and the frequency control circuit (11) and includes an inverter transformer (78) as well as coupling capacitors (86 and 88) for generating a voltage across the gas discharge tubes (40 and 40'). Automatic gain control circuitry (17) is included in inverter transformer (78) and is made up of a pair of secondary windings (80 and 81) wound so as to provide a negative feedback voltage to each of the transistors (70 and 70') of the switching network (13). The inverter transformer (78) has a pair of primary windings (82 and 84) which operate alternately and are coupled to the primary windings (45) of frequency control transformer (43 ) to provide a repetitive cycle.</p> |
