Injection-Locking Techniques for Nonharmonic Oscillators
This chapter investigates the techniques that increase the lock range of nonharmonic oscillators. It studies the impact of the degree of the nonlinear characteristics of nonharmonic oscillators on the lock range of these oscillators and investigates the lock range of dual-comparator relaxation oscillators with single unitone injection and that with dual unitone injections. The lock range of dual-comparator relaxation oscillators with dual multitone injections is derived. It compares the lock range of dual-comparator relaxation oscillators with single multitone injection and that with dual multitone injections. The impact of the duty cycle of multitone injection signals on the lock range of nonharmonic oscillators is investigated. The impact of the frequency attenuation mechanism on the lock range of both harmonic and nonharmonic oscillators is investigated and compared.