The current flowing through the horizontal deflection coil of a cathod ray
tube is controlled by a transistor which is switched between saturation
and cut off by a circuit having a pulse generator for generating a pulse
in response to a horizontal synchronizing pulse. The leading edge of the
generated pulse is delayed before being applied to the controlling
transistor which switches sometime thereafter due to the storage time of
the transistor. To insure that the blanking of the electron beam of the
tube takes place during the retrace time, the blanking interval is set to
occur a period of time after the horizontal synchronizing signal which is
less than the sum of the storage time of the transistor and the time which
the leading edge of the generated pulse is delayed.
Current U.S. Class: |
315/384 ; 315/408; 315/410; 348/E3.033 |
Current International Class: |
H03K 4/64 (20060101); H03K 4/00 (20060101); H04N 3/16 (20060101); H01J 029/52 () |
Field of Search: |
315/384,386,399,408,409,410
|