Drive apparatus for frame deflection and method
View Patent ↗A frame drive circuit for a CRT device having a deflection processor ( 14 ) which develops a deflection processor output signal includes a frame coil ( 16 ) having a first core half ( 12 ) and a second core half ( 18 ), and a first driver ( 20 ) and a second driver ( 22 ). The deflection processor output signal is applied to each of the first driver ( 20 ) and the second driver ( 22 ). Each of the first driver ( 20 ) and the second driver ( 22 ) are selectively operative independently of each other to develop respectively a first coil drive signal ( 24 OUT) and a second coil drive signal ( 26 OUT) as a function of the deflection processor output signal. The first coil drive signal ( 24 OUT) and the second coil drive signal ( 26 OUT) are applied to a respective one of the first coil half ( 12 ) and said second coil half ( 18 ).
1. A frame drive circuit system comprising:
a deflection processor configured to develop a deflection processor output signal;
a first driver and a second driver, each configured to receive the deflection processor output signal,
each of the first driver and the second driver being selectively operative independently of each other to develop respectively a first coil drive signal and a second coil drive signal as a function of the deflection processor output signal;
a first coil half frame and a second coil half frame configured to receive the first coil drive signal and the second coil drive signal respectively;
wherein each of the first driver and the second driver are configured to amplify the deflection processor output signal to develop each respective one of the first coil drive signal and the second drive signal, wherein each of said the first driver and said the second driver are configured to DC shift said the deflection processor output signal to develop each respective one of said the first coil drive signal and said the second coil drive signal.
2. The frame drive circuit as set forth in claim 1
wherein each of the first driver and the second driver include an amplifier having an input and an output,
the input of each amplifier being configured to receive the deflection processor output signal,
the output of each amplifier configured to develop an amplified signal for application to a respective one of the first coil half and the second coil half.
3. The frame drive circuit as set forth in claim 1
wherein each of the first driver and the second driver include a DC level shifter having an input and an output, the input of each DC level shifter being configured to receive the deflection process output signal, the output of each DC level shifter configured to develop a DC level shifted signal for application to a respective one of the first coil half and the second coil half.
4. A method of developing a deflection processor output signal using a frame drive circuit comprising:
applying the deflection processor output signal to a first driver and a second driver;
wherein the first driver and second driver are selectively operative independently of each other;
developing a first coil drive signal and a second coil drive signal as a function of the deflection processor output signal;
applying the first coil drive signal and the second coil drive signal to a respective first coil half and a second coil half of the frame coil; and
amplifying the deflection processor output signal using the first driver and second driver to develop the respective first coil drive signal and second coil drive signal and DC level shifting the deflection processor output signal with the first driver and second driver to develop each respective one of the first coil drive signal and the second coil drive signal.
5. The method of claim 4 further comprising:
receiving the deflection processor output signal in an input to the first and second driver;
developing an output of the first and second driver wherein the output is a DC level shifted signal;
applying the output of each DC level shifted signal to a respective one of the first coil half and the second coil half.