| 摘要 |
The invention relates to a circuit arrangement with a measuring bridge, comprising an alternating-voltage generator, with an amplifier, with a phase-sensitive rectifier and with a low-pass filter. To make such a circuit arrangement insensitive to temperature-related changes in the phase relationship between the single at the output of the amplifier and the voltage at the control input of the phase-sensitive rectifier, using comparatively little circuit outlay, the alternating-voltage generator (1) is connected via a one-way rectifier (4) to the input diagonal (5, 6) of the measuring bridge (7), and the control input (22) of the phase-sensitive rectifier (17) is connected to the alternating-voltage generator (1) via a squarewave pulse generator (20) which is formed by a transistor (23) controlled by the alternating-voltage generator (1). The circuit arrangement is mainly suitable for measuring bridges with strain gauge converters. <IMAGE>
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