Blocking capacitor compensation system suitable for zero intermediate frequency receiver

The invention discloses a blocking capacitance compensation system suitable for a zero intermediate frequency receiver. The blocking capacitance compensation system comprises a first chopping operational amplifier module, a second chopping operational amplifier module, an operational amplifier and a...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: YU SONGLI, SHENG LIANGLIANG
Format: Patent
Sprache:chi ; eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The invention discloses a blocking capacitance compensation system suitable for a zero intermediate frequency receiver. The blocking capacitance compensation system comprises a first chopping operational amplifier module, a second chopping operational amplifier module, an operational amplifier and a switched capacitor integrator. According to the invention, signals are chopped and amplified twice through the first chopping operational amplifier module and the second chopping operational amplifier module, and offset voltage and flicker noise of an operational amplifier can be chopped once, so that the signals are separated from direct-current offset and flicker noise of the operational amplifier, the offset and the noise are filtered out, and the original signals are not influenced; meanwhile, low-pass filtering with the bandwidth being only 10 Hz is achieved through the switched capacitor integrator, direct-current signals are choked through negative feedback of the switched capacitor integrator, and the comp