Demagnetizing circuit
AssigneeMicronas GmbH
InventorPeter Preller
Life of this patent
Estimating the term…
Abstract
For achieving a desired course in the demagnetizing circuit (I1) and power dissipation that is as low as possible during continuous operation of a color television set, a demagnetizing circuit for controlling the demagnetizing current (I1) includes two transistors (T1, T2) that are controlled via a common or via two separate capacitive voltage dividers (C1-C4). A rectified alternating voltage is applied to the capacitive voltage dividers (C1-C4). The demagnetizing current (I1) controlled by the transistors (T1, T2) is supplied to a demagnetizing coil (R4).
Claims21
A demagnetizing circuit, comprising:
- first and second supply voltage terminals that receive an alternating supply voltage;
- a demagnetizing coil arranged between said first and second supply voltage terminals;
- a first transistor and a second transistor are arranged between said first supply voltage terminal and said second supply voltage terminal;
- and
- a control terminal connected to said first transistor and to said second transistor for controlling said first and second transistors via capacitive circuit means and to which a rectified alternating supply voltage is applied.
A demagnetizing circuit that receives an alternating supply voltage, and applies a demagnetizing current to a demagnetizing coil, comprising:
- first and second supply voltage terminals across which the alternating supply voltage is received;
- a first transistor and a second transistor arranged between said first supply voltage terminal and said second supply voltage terminal to receive the alternating supply voltage;
- and
- a control terminal connected to said first transistor and to said second transistor for controlling said first and second transistors via capacitive circuit means to which a rectified alternating supply voltage is applied.
Dependencies are inferred from the claim text.