Patent ID: 7518438
Filing Date: 2009-04-14
Classification: H03D,H03H,H04L

Abstract:
1. An FM detector circuit, comprising: an unbalanced/balanced conversion circuit; a first diode having one end connected to a first balanced output terminal of the unbalanced/balanced conversion circuit; a second diode having one end connected to a second balanced output terminal of the unbalanced/balanced conversion circuit; a resonator connected in parallel to the first diode; a capacitor element connected in parallel to the second diode; a signal synthesis circuit having two input terminals to which the other end of the first diode and the other end of the second diode are connected, respectively; and a low-pass filter connected to an output terminal of the signal synthesis circuit; wherein one end of the resonator is connected to an anode terminal of the first diode and another end of the resonator is connected to a cathode terminal of the first diode; and one end of the capacitor is connected to an anode terminal of the second diode and another end of the capacitor is connected to a cathode terminal of the second diode.