| 摘要 |
<p>1293122 Automatic voltage regulation MOTOROLA Inc 7 Jan 1970 [15 Jan 1969] 711/70 Heading G3X [Also in Division H3] A circuit for tuning a plurality of resonant circuits 11, 18, 30 each including a voltage variable capacitor 14, 20, 31 has a reference voltage means 50 connected to a D. C. source B+ for providing different D. C. reference voltage outputs, such as 59 and earth, to different ones of the voltage variable capacitors and a variable control voltage 51 obtained from the D. C. source B+ supplies all of the resonant circuits so as to simultaneously tune the circuits such that the resonant circuits have a predetermined constant frequency offset established by the different reference voltage outputs. Zenor diode 54 stabilizes the D.C. output voltages from the bridge 50 and by making resistor 55 greater than 56 variation of the Zener voltage of diode 54 can be compensated. Silicon diodes 53 compensate for the effects of temperature on the Zener diode 54.</p> |
