CIRCUIT FOR REDUCING AMPLIFIER NOISE AND NEGATIVE IMPEDANCE
The invention provides a circuit, which includes a first operational amplifier having an inverting input and a non-inverting input; and a negative resistance circuit connected to the inverting input of the operational amplifier. The negative resistance circuit includes a second operational amplifier...
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Patent |
| Sprache: | chi ; eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | The invention provides a circuit, which includes a first operational amplifier having an inverting input and a non-inverting input; and a negative resistance circuit connected to the inverting input of the operational amplifier. The negative resistance circuit includes a second operational amplifier, a current source controlled by the second operational amplifier, and a cross-coupled transistor circuit having at least one transistor biased by a current produced by the current source. By using the technical scheme, the internal noise of the operational amplifier can be reduced and circuit instability cannot be caused. |
|---|