| 摘要 |
A jitter generation apparatus for applying a phase modulation to a PLL is controlled by a control unit so as to output a signal with the desired jitter based on a parameters. When a switching unit is switched to a first state, the control unit controls first and second level control units so that the desired jitter in which an amplitude of a first modulation signal matches the parameter is added to an output signal from a voltage controlled oscillator unit, and passes through a quadrature modulator. When the switching unit is switched to the second state, the control unit controls the first and second level control units so that a quadrature modulation is applied to a local signal, which is input to the quadrature modulator without adding any jitter to an output signal from the voltage controlled oscillator unit, and a quadrature-modulated local signal is output. |
