Current detector with variable output voltage level
A current detector with variable output voltage level. The current detector includes an operational amplifier, an adjusting circuit, a first circuit for a detecting current run through, and a clamping circuit. The operational amplifier includes a non-inverting input terminal, an inverting input term...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | A current detector with variable output voltage level. The current detector includes an operational amplifier, an adjusting circuit, a first circuit for a detecting current run through, and a clamping circuit. The operational amplifier includes a non-inverting input terminal, an inverting input terminal, and an output terminal. The operational amplifier is connected to an antenna supply voltage and ground. The adjusting circuit includes a sensing point, coupling to the inverting input terminal. The first circuit has one terminal coupled to the antenna supply power, and the other terminal coupled to the non-inverting input terminal. The non-inverting input terminal is a detecting point. The clamping circuit, coupled to the output terminal of the operational amplifier, clamps the output voltage level of the operational amplifier to a predetermined range. When the detecting point keeps floating, the output voltage level of the clamping circuit is at high logic level. |
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