Current controlling device and signal converting apparatus applying the current controlling device

A current controlling device includes: a first resistive circuit arranged to selectively conduct a first current to a first output terminal from a first input terminal; and a second resistive circuit arranged to selectively conduct a second current to a second output terminal from the first input te...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Lou Chih-Hong, Huang Yen-Chuan, Wang Chi-Yun, Wu Min-Hua
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:A current controlling device includes: a first resistive circuit arranged to selectively conduct a first current to a first output terminal from a first input terminal; and a second resistive circuit arranged to selectively conduct a second current to a second output terminal from the first input terminal; wherein when the first resistive circuit conducts the first current to the first output terminal and when the second resistive circuit does not conduct the second current to the second output terminal, the first input terminal has a first input impedance; when the first resistive circuit does not conduct the first current to the first output terminal and when the second resistive circuit conducts the second current to the second output terminal, the first input terminal has a second input impedance substantially equal to the first input impedance.