SU674187A1 - Device for automatic tuning of heterodyne frequency - Google Patents

Description

(54) DEVICE FOR AUTOMATIC ADJUSTMENT OF HETERODINE FREQUENCY

issss sssSSs ;; . ;;::: a, the values of which are determined by the ratio of the I – NIN pulse, and the diode 9 are locked by the positive voltage of the capacitor W. The device receives impulses that transform into a control voltage Pf 1 1a1ShSh | ZS go voltage. When programs are selected, the transistor I of the control unit 6 opens, the KQH capacitor 10 separates through the open transistor II, shorting it through the daad pulse inputs, and at the output of the CO unit; The 5th increment of the control of its voltage Uynp is missing. Thus, the device is connected to the circuit. After the transistor 11 is locked through diode 9, the capacitor 10 begins to be charged with positive pulses. On the basis of the load of the 10 demodulator 10, the diode 9 is ignored, and the amplitude of the amplitude of the amplifiers arrives at the input of the matching unit 5, resulting in a fire (above the control voltage Iupr and the device is turned on. At that time, when the diode 9 completely closes , the device returns to its original state. Time for which the device is turned off, 011 is constant t RCr:.; The proposed device is the device that captures the sound carrier when switching from Manual mode to Automatic and recognizes the Ruby TV set 712. When lane During the run from the Manual to Automatic mode mode, the voltage spike on the 12 bus is significantly reduced to 0.25 and at the first moment through Daod 9 MjtoJweHCWop JiO sakoif metCK aea arrival of the pulses to the input of the brighter 5 at the same time as the 5 Jumble pattern The first one is a lag, a great moment of a spike rush. V. .......,: .. .. So, when switching from Manual mode to Automatic Splash, i vi yyiay & Shch iiipi iaitt splash due to the fact that the device 1 is included

Claims (1)

674187 delay, longer duration of voltage rise. Then the process of capacitor 10 and pulse buildup occurs, and the input to matching unit 5 stops. Consequently, the device does not turn on instantly, but also as the condenser is charged. The proposed device significantly reduces the positive voltage spike at juncture 12 during the transition from the Manual and Automatic mode, which eliminates the seizure to the carrier of the sound, and when selecting the program, during the transition process, the device turns off, resulting in the elimination of false signals. Claims The device of automatic adjustment of the local oscillator frequency contains a block connected tunable heterodyne and mixer, an intermediate frequency path with frequency distributor, an automatic key and a matching unit, the additional input of which is connected to the control unit of the control unit and the matching unit, which is additionally connected to the control unit of the control unit and the matching unit, the additional input of which is connected. | and also the source of the pulses and the second key is a G-man, one of the second GG 1 loCsHmstrobk, parallel to the input of the source and syniiCOB the interlocking circuit is turned on, which consists of the 1st 1st C of the Symphony & connected resistors, didd1 | th; 1), parallel to the second key, an automatic switch is connected to the resistor with a diode and loioiiw. With a 1 kB capacitor, they are connected1 | (Envy6ZhVDODu excitation unit matching and vyghodu blocking interlocking unit. Sources of information taken into account during the examination 1. S. A. El Shkevich. Automatic control in televisions. M., Energie, 1968, Fig. 1-2.