| 摘要 |
PURPOSE:To simplify a correcting work, by constituting a device such that a voltage, fetched from a carrier voltage supply source, is amplitude-modulated via a DA converter by a plural number of digital switches to supply it to a primary side of an input transformer via a switching circuit. CONSTITUTION:When a correction is made on a measuring bridge 1, it is set to an arbitrary value by means of a 4-column digital switch in an input unit 19, and a voltage, fetched from a carrier source power source 11 by a combining transformer 21, is amplitude-modulated through a DA converter 20. The voltage is supplied to a primary side of an input transformer 2 via amplifier 22, a switching circuit 23, a combining transformer 24, and a resistance 13 to perform a correction. An arbitrary correction value can be produced by a simple constitution, which results in simplifying a correction work. |
