Abstract:
A voltage controlled oscillator including a resonator which generates an oscillation signal, a frequency of which is in response to a control signal, and an amplifier which amplifies the oscillation signal. Also included is a frequency adjusting mechanism, as well as a voltage control sensitivity mechanism. In one example, the resonator includes an input terminal to which the control signal is applied, a variable capacitance diode and a main inductor. The oscillation frequency adjusting mechanism includes a first variable capacitor, arranged in parallel with the main inductor of the resonator. In addition, the voltage control sensitivity adjusting mechanism includes a second variable capacitor arranged between the input terminal and the amplifying mechanism, and also arranged between a hot terminal of the variable capacitance diode and a hot terminal of the main inductor.
Abstract:
A voltage controlled oscillating circuit is disclosed. The circuit includes: a .mu.-strip resonance circuit for deciding the resonance frequency in accordance with an external tuning voltage; an oscillation amplifying circuit for performing oscillations in accordance with the resonance frequency signals of the .mu.-strip resonance circuit; and a buffer amplifying circuit provided between the oscillating circuit and the load, and for preventing the load pulling phenomenon. The oscillation amplifying circuit forms a common collector oscillating circuit in with a single oscillation amplifying transistor, and the buffer amplifying circuit forms a single step amplifying circuit with a single buffer amplifying transistor. The oscillation amplifying transistor and the buffer amplifying transistor form a cascode amplifying transistor with a signal inducing coil and an RF choke coil for blocking the ac components and for forming a series of dc bias paths. Consequently, a low power consumption and a miniaturization of the voltage controlled oscillating circuit are realized, as well as a low product price.
Abstract:
One example discloses a data processing device, comprising: a local oscillator (LO) having an LO frequency output, an LO performance parameter output, and an LO frequency select input; and a degradation detection module, coupled to the LO performance parameter output and to the LO frequency select input, and including an LO frequency select module triggered by the LO performance parameter output. Another example discloses an article of manufacture comprises at least one non-transitory, tangible machine readable storage medium containing executable machine instructions for controlling a data processing device which comprise: monitoring a set of local oscillator (LO) performance parameters; setting an LO degraded state when at least one of the LO performance parameters is not within a predetermined range; and adjusting an LO frequency in response to the LO degraded state.
Abstract:
One example discloses a data processing device, comprising: a local oscillator (LO) having an LO frequency output, an LO performance parameter output, and an LO frequency select input; and a degradation detection module, coupled to the LO performance parameter output and to the LO frequency select input, and including an LO frequency select module triggered by the LO performance parameter output. Another example discloses an article of manufacture comprises at least one non-transitory, tangible machine readable storage medium containing executable machine instructions for controlling a data processing device which comprise: monitoring a set of local oscillator (LO) performance parameters; setting an LO degraded state when at least one of the LO performance parameters is not within a predetermined range; and adjusting an LO frequency in response to the LO degraded state.
Abstract:
A VCO circuit has a voltage variable capacitance CVD2 connected in series with or in parallel to a condenser C3 connected in series with an inductance L1, which constitutes a resonator of the VCO circuit. An adjustment voltage VD2 is applied to a cathode of the voltage variable capacitance CVD2, such that the relation between a control voltage VD1 and an oscillation frequency f0 of the VCO circuit is electrically adjusted to improve the fabrication yield.