eory to practice. Firstly, this requires us to map the oscillator's circuit topology on the template of Fig. 5.28. Furthermore, we need a way to evaluate the functions hq (q,t). Hereby, we focus on the dominant component hq,T(q1). In what follows, all computational proce- dures are outlined for the harmonic quadrature oscillator shown in Fig. 5.29. Adapting the procedures to other types of (coupled) harmonic oscillators is straightforward. As presented, the procedures are easily implemented on top of existing simulation algo- rithms. A resonant tank's effective capacitance and inductance values Ck and Lk are determined by fitting the admittance GRLC(jW) of an RLC tank onto the one simulated using the setup shown in Fig. 5.29. Here, we use voltage sources V1 and V2 to apply the in-phase and quadrature voltages v1(t) = Avcos(wt) (5.170) v2(t) = 0 (5.171) with Av a sufficiently small voltage. By measuring the resulting steady-state currents I and I2 through the voltage sources, we retrieve the information necessary to compute, for instance, G1 (jw). This simulated admittance is fitted onto that of an RLC tank for frequencies W in the neighborhood of the resonant frequency (00,1 = arg min|G1(jo) (5.172) 5.8.3 Experimental results The setup in Fig. 5.29 guarantees that all fringe (transistor) capacitances are taken into account as part of the effective tank capacitances C1. Accurate modeling also requires us to account for output loading due to subsequent blocks, e.g. buffers. This can be accomplished by adding extra capacitors at the output nodes that model the input impedance of these subsequent blocks. Computing hq,T (q1) for a given set of values for q1 requires the currents Ik. To obtain, for instance, we apply v1(t) = ViAjcos(wot+0) (5.173) v2(t) = V2A2 (5.174) in the measurement setup of Fig. 5.29. Here, V1 and V2 are normalization constants introduced in (5.144). I dv2 dt ...,t) then equals the periodic steady-state current that flows through the voltage source V1. These steady-state currents can be determined