Patent ID: 7167064
Filing Date: 2007-01-23
Classification: H01P,H03H

Abstract:
1. A phase shift circuit comprising: a capacitor; and a series circuit composed of a transistor and an inductor connected in series with the transistor, said series circuit being connected in parallel with said capacitor; wherein a gate of the transistor is connected with a bias terminal so that when a source voltage is applied to the bias terminal the transistor exhibits a resistivity and so that when the source voltage is equal to or below a pinch-off voltage the transistor exhibits a capacitivity, wherein said capacitor and one terminal of said series circuit are electrically connected with a high frequency signal input/output terminal, wherein the capacitor is directly connected with ground, and wherein the capacitance of said capacitor is C, the inductance of said inductor is L, the capacitance of said transistor is C