Resonance control

Frequency limiting is also provided on all the resonant controllers on the market today. The resonant frequency of the tank circuit is given by... 

Next, decide the natural resonance frequency of the tank circuit. For the available quasi-resonant controller ICs on the market, the range is between 1 and 2 MHz. This limit should be considered the maximum limit within conventional QR designs. So 1 to 1.5 MHz is a typical choice. Lower frequencies can be used and some efficiencies can be gained. The equation for the resonance frequency is... 

Fig. 8 also illustrates another feature of difference spectroscopy. The out-of-phase signal at the centre of the control spectrum comes from the residual CHCI3, folded in from outside the spectral window. The difference artifact from this signal is worst in the spectra at the centre of Fig. 8. The experiments were performed in the usual way, by doing a series of on-resonance irradiations (in this case 8) followed by one off-resonance control irradiation, and repeating the whole cycle several times for signal averaging. It is apparent that the further away in time the spectrum is from the control, the worse the difference artifact.

The effect of the Stark shifts on the seam of Cl connecting the Si and S2 states is of particular interest. As seen in Table7.1, the Si component is roughly twice as large as the S2 component at the EC geometry. As a result, the interaction of the molecule with a strong non-resonant control pulse is expected to shift the Cl away from the FC region. 

Liang, H.-P., Wan, L.-J., Bal, C.-L, and Jiang, L. [2005] Gold hollow nanospheres Tunable surface plasmon resonance controlled by interior-cavity sizes,/ Phys. Chem. B, 109(16], 7795-7800. 

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