galaxi digicolor 26 chassis ittsel


Posted on Feb 4, 2014

A multiple automatic brightness control for a television receiver including a first automatic brightness limiter (ABL) circuit responsive only to relatively long duration changes in brightness-producing current and a second ABL circuit responsive to brightness-producing current changes of shorter duration than the first ABL circuit. Both ABL circu


galaxi digicolor 26 chassis ittsel
Click here to download the full size of the above Circuit.

its have threshold levels below which they are not responsive to brightness-producing current changes, but the threshold level of the second ABL circuit is higher than that of the first so that, while the second ABL circuit responds more quickly than the first, it does so only for higher amplitude changes in the brightness-producing current. C. a first automatic brightness limiter circuit coupled to said brightness current circuit to respond to brightness current in excess of a first threshold brightness current level for producing a first control signal to limit said brightness current to said first threshold level, said first automatic brightness limiter circuit comprising a first time constant circuit through which said first control signal is applied to said brightness control means; D. a second automatic brightness limiter circuit coupled to said brightness current circuit to respond to brightness current only in excess of a second threshold brightness current level higher than said first threshold level for producing a second control signal to limit said brightness current to said second threshold level, said second automatic brightness limiter circuit comprising a second time constant circuit having a lower time constant value than said first time constant circuit and through which said second control signal is applied to said brightness control means such that said brightness control means is responsive to second...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    PLL 1 Watt FM transmitter
    Tactile sensors Motor controller
    rf detector electronic project circuit design using 2n2222 transistors
    soft light dimmer circuit
    Thyristor Tester
    The Gentle Touch
    Mini IR Theremin Circuit
    Voltage output humidity sensor meter circuit HM1500 / 1520 with microprocessor PIC16F874
    Pressure Transmitter Data Acquisition System circuit 1B31,18 bit A / D converter AD1170 and MCS-51 microcontroller
    300kHz signal generator circuit
    Automatic emergency lighting circuit
    Fan automatic control circuit



    Top