发明授权
- 专利标题: Method of calibrating a multistage selective amplifier
- 专利标题(中): 校准多级选择放大器的方法
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申请号: US09156366申请日: 1998-09-17
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公开(公告)号: US06188970B1公开(公告)日: 2001-02-13
- 发明人: Karl Anton Becker , Stefan Brinkhaus , Armin Ganz , Bernd Memmler , Hans-Eberhardt Kroebel
- 申请人: Karl Anton Becker , Stefan Brinkhaus , Armin Ganz , Bernd Memmler , Hans-Eberhardt Kroebel
- 优先权: DE19741325 19970919
- 主分类号: G01R3500
- IPC分类号: G01R3500
摘要:
In a method for calibrating or aligning a multistage selective amplifier including an oscillator circuit and at least one tuning circuit, the tuning voltages respectively necessary for aligning the respective tuning circuits to the required receiving frequency are calculated directly from a mathematical relationship between the respective tuning voltage and the oscillator voltage. In order to achieve this, a characteristic multiplicative coefficient and a characteristic additive factor for each tuning circuit are stored in a memory upon manufacturing or switching on the device. In order to select a desired receiving frequency, the respective stored values as well as an oscillator voltage are provided to an amplification circuit, which correspondingly amplifies the oscillator voltage by the multiplicative coefficient and the additive factor and then provides the resulting output value as a tuning voltage to the respective tuning circuit. Thus, all necessary tuning voltages can be determined from the two respective stored values per tuning circuit, as necessary for selecting any desired receiving frequency.