Direct draw amplifier for magnetic deflection cathode ray tubes

Claim 2

A composite power amplifier circuit comprising: a. a low power amplifier; b. a high power amplifier having greater output power capability than said low power amplifier: c. input means for receiving input signals; d. signal output means connected to receive output signals from said high power amplifier and said low power amplifier; and e. means for continuously conveying input signals from said input means to said high and low power amplifiers said conveying means including means for providing a higher gain path to said low power amplifier, so that for small signals said low power amplifier provides most of the output power from said composite amplifier circuit, and so that for large signals said high power amplifier provides a portion of the output power from said composite amplifier circuit.

Claim 3

A composite power amplifier circuit according to claim 1 further including feedback means associated with said signal output means and said input means, for conveying feedback signals indicative of said output signals to said input means.

Claim 4

A composite power amplifier circuit according to claim 2 wherein said input means includes a preamplifier connected to receive said input signals and said feedback signals.

Claim 5

A composite power amplifier circuit according to claim 1 wherein said signal output means includes an electrical impedence element connected to receive output signals from said low power amplifier.

Claim 6

A high efficiency multi-sectioned amplifier comprising: a. input means for receiving input signals; b. a first amplifier circuit adapted to be connected to a high voltage power supply; c. a second amplifier circuit adapted to be connected to a low voltage power supply having a supply voltage of smaller absolute value than the supply voltage of the high voltage power supply; d. means connected for conveying said input signals from said input means to said first amplifier circuit; e. a coupling amplifier circuit having an input connected to said first amplifier circuit for receiving said input signals therefrom, and an output connected to said second amplifier circuit, said coupling amplifier circuit being operable to supply amplified input signals to said second amplifier circuit; f. signal output means connected to receive high voltage output signals from said first amplifier circuit; and g. isolation means connected to said second amplifier circuit and said signal output means for conveying low voltage output signals from said second amplifier circuit to said output means and for electrically isolating the output of said second amplifier circuit from the output of said first amplifier circuit.

Claim 7

A high efficiency multi-sectioned amplifier comprising: a. input means for receiving input signals; b. a first amplifier circuit adapted to be connected to a high voltage power supply; c. a second amplifier circuit adapted to be connected to a low voltage power supply having a supply voltage of smaller absolute value than the supply voltage of the high voltage power supply; d. means connected for conveying said input signals from said input means to said first amplifier circuit; e. a coupling amplifier circuit having an input connected to said first amplifier circuit for receiving said input signals therefrom, and an output connected to said second amplifier circuit, said coupling amplifier circuit being operable to supply amplified input signals to said second amplifier circuit; f. signal output means connected to receive high voltage output signals from said first amplifier circuit; and g. isolation means connected to said second amplifier circuit and said signal output means for conveying low voltage output signals from said second amplifier circuit to said output means and for electrically isolating the output of said second amplifier circuit from the output of said first amplifier circuit.

Claim 8

The apparatus of claim 5 further including feedback means associated with said signal output means and said input means, said feedback means for conveying feedback signals indicative of the output of said high efficiency multi-sectioned amplifier to said input means.

Claim 9

The apparatus according to claim 6 wherein said input means includes a preamplifier circuit connected for receiving said input signals and said feedback signals.

Claim 10

The apparatus according to claim 7 wherein said feedback means includes a current sensing resistor associated with said signal output means.

Claim 11

The apparatus according to claim 7 wherein said feedback means includes means for sensing the voltage at said signal output means, and wherein said input means includes an input capacitor for characterizing the frequency response of said high efficiency multi-sectioned amplifier.

Claim 12

A high efficiency deflection amplifier for driving the deflection coil of a cathode ray tube, comprising: a. input means for receiving input signals; b. an output terminal adapted to be connected to said deflection coil; c. a high voltage amplifier including an output transistor having a collector circuit adapted for connection to high voltage power source, a base circuit connected for receiving input signals from said input means, and an emitter circuit connected for delivering high voltage output signals to said output terminal; d. a low voltage amplifier including an output transistor having a collector circuit adapted for connection to a low voltage power source having a supply voltage of lesser magnitude than the high voltage power source, a base circuit, and an emitter circuit; e. a coupling amplifier having an input connected to the collector circuit of said high voltage amplifier output transistor for receiving amplified input signals therefrom, said coupling amplifier having an output connected to the base circuit of said low voltage power amplifier output transistor, said coupling amplifier operable to deliver amplified input signals to said low power amplifier; f. an inductive impedance element connecting said emitter circuit of said low power amplifier output transistor to said output terminal, whereby low voltage low frequency signals are primarily supplied by said low power amplifier section, while high voltage frequency components are supplied by said high power amplifier section; and g. feedback means connected to said input means and associated with said ouput terminal, said feedback means operable to supply feedback signals indicative of said output signals to said input means.

Claim 13

A high efficiency deflection amplifier for driving the deflection coil of a cathode ray tube, comprising: a. input means for receiving input signals; b. an output terminal adapted to be connected to said deflection coil; c. a high voltage amplifier including an output transistor having a collector circuit adapted for connection to high voltage power source, a base circuit connected for receiving input signals from said input means, and an emitter circuit connected for delivering high voltage output signals to said output terminal; d. a low voltage amplifier including an output transistor having a collector circuit adapted for connection to a low voltage power source having a supply voltage of lesser magnitude than the high voltage power source, a base circuit, and an emitter circuit; e. a coupling amplifier having an input connected to the collector circuit of said high voltage amplifier output transistor for receiving amplified input signals therefrom, said coupling amplifier having an output connected to the base circuit of said low voltage power amplifier output transistor, said coupling amplifier operable to deliver amplified input signals to said low power amplifier; f. an inductive impedance element connecting said emitter circuit of said low power amplifier output transistor to said output terminal, whereby low voltage low frequency signals are primarily supplied by said low power amplifier section, while high voltage frequency components are supplied by said high power amplifier section; and g. feedback means connected to said input means and associated with said ouput terminal, said feedback means operable to supply feedback signals indicative of said output signals to said input means.