| 摘要 |
A balanced crystal oscillator circuit comprising: a piezoelectric element Xtal ( 207; 215; 222,221; 313 ); a first oscillator subcircuit ( 202; 210; 218; 302 ) incorporating a transistor ( 204;212;220;304 ); and a second oscillator subcircuit ( 201;209;217;301 ) incorporating a transistor ( 203; 211; 219; 303 ); wherein the transistors each have different types of transistor terminals (C,B,E; D;G;S), and wherein the oscillator subcircuits are configured with at least three interconnections. Each interconnection comprise a pair of like type of transistor terminals; wherein a first of said interconnections constitutes a connection to a ground reference (gnd); a second of said interconnections is via a first resonator element ( 207;215;223;313 ); and a third of said interconnections is via a second resonator element ( 208;216;224;314 ); said first and second circuits are arranged to interact by means of said first and second resonator elements to form a balanced oscillator signal. A dual common base or a dual common collector configuration is preferred.
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