Patent ID: 8169269
Filing Date: 2012-05-01
Classification: H03B

Abstract:
1. A Hartley voltage controlled oscillator (VCO) circuit comprising two inductors (L d , L g ), a transistor (Q 1 ) and a varactor (C) wherein the two inductors (L d , L g ) are arranged as a coupled inductor pair operable to enable positive mutual inductance (M) between them, wherein the arrangement comprising four inductors (L d1 , L g1 , L d2 , L g2 ) arranged into two coupled inductor pairs, two varactors (C 1 , C 2 ), and two transistors (Q 1 , Q 2 ), wherein: the first varactor (C a third terminal (Q a first inductor (L a second inductor (L the second varactor (C a third terminal (Q a third inductor (L a fourth inductor (L wherein the first inductor (L