| 摘要 |
A linear voltage-current amplifier circuit operable over a wide voltage range comprises first (Q81, Q93) and second (Q82, Q94) series circuits coupled in parallel between first (80) and second (91) voltage lines and each having an input field effect transistor (Q81, W82) and a load field effect transistor (Q93, Q94). the intermediate junctions of said first and second series circuits being coupled to output means (88, 89). Also coupled to these intermediate junctions are means (97) for generating a control signal having a value proportional to the sum of the potentials at said intermediate junctions, said control signal being supplied to the gates of said load transistors (Q93, Q94), thereby providing active loads of said amplifier circuit. This results in a considerable broadening of the in-phase voltage range. |
