Analog conditioning circuitry for imagers for a display

A method of generating a high speed symmetrical analog voltage signal for driving an imager, comprising:

• providing a single low speed DC signal path, wherein the single low speed DC signal path comprises selectable positive and negative DC offset voltages with respect to a reference voltage;
• providing a high speed analog video signal path, separate from the single low speed DC signal path, for supplying a high speed analog video signal;
• and
• combining the selectable positive and negative DC offset voltages with the high speed analog video signal to produce an analog signal selectively offset positively or negatively with respect to the reference voltage.

A method of generating a symmetrical analog voltage signal for driving an imager, comprising:

• providing a single DC signal path, wherein the single DC signal path comprises selectable positive and negative DC offset voltages with respect to a reference voltage;
• providing a analog video signal path, separate from the single DC signal path, for supplying an analog video signal;
• and
• combining the selectable positive and negative DC offset voltages with the analog video signal to produce an analog signal selectively offset positively or negatively with respect to the reference voltage.

A monitor, comprising:

• a display;
• at least one imager, coupled to provide light energy to the display;
• an analog conditioning circuit, coupled to supply a high speed symmetrical analog output voltage signal to the at least one imager, wherein the analog conditioning circuit comprises,
• an upper bias amplifier block, coupled to receive a first input signal and generate an upper DC offset voltage signal;
• a lower bias amplifier block, coupled to receive a second input signal and generate a lower DC offset voltage signal;
• a switching block, coupled to receive the upper and lower DC offset voltage signals and to alternate a selection of the upper and lower DC offset voltage signals;
• a select signal generator, coupled to generate a select signal and provide the select signal to the switching block;
• a high speed analog output block, coupled to the select signal generator for generating a high speed analog voltage signal from inverted and non-inverted digital data;
• and
• a merge block, coupled to receive and combine a selected DC offset voltage signal and the high speed analog voltage signal to generate a high speed symmetrical analog output voltage signal;
• a digital-to-analog converter, coupled to supply an analog video signal to the analog conditioning circuit;
• a display controller, coupled to supply a processed digital video signal to the digital-to-analog converter;
• and
• an analog-to-digital converter, coupled to receive an analog signal from a graphics card and supply a digital video signal to the display controller.

A monitor, comprising:

• a display;
• at least one imager, coupled to provide light energy to the display;
• an analog conditioning circuit, coupled to supply a high speed symmetrical analog output voltage signal to the at least one imager, wherein the analog conditioning circuit comprises,
• a single DC signal path for generating selectable positive and negative DC offset voltages with respect to a reference voltage;
• an analog video signal path, separate from the single DC signal path, for supplying an analog video signal;
• and
• a combiner for combining the selectable positive and negative DC offset voltages with the analog video signal to produce an analog signal selectively offset positively or negatively with respect to the reference voltage.