| 摘要 |
PCT No. PCT/GB89/00415 Sec. 371 Date Dec. 17, 1990 Sec. 102(e) Date Dec. 17, 1990 PCT Filed Apr. 19, 1989 PCT Pub. No. WO89/10656 PCT Pub. Date Nov. 2, 1989.An analogue amplifier circuit has a gain stage comprising two differential operational amplifers (17, 18) and an error correction stage comprising two differential operational amplifiers (20, 21) each connected with its inputs across the inputs of a respective gain stage amplifier and its output connected to the non-inverting input of the other gain stage amplifier. A balanced output from the outputs of the two gain stage amplifiers (17, 18) may be provided or these two outputs may be fed to a final stage amplifier (22) to provide a single output.
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