Class / Patent application number | Description | Number of patent applications / Date published |
331037000 | BEAT FREQUENCY | 6 |
331040000 | Frequency or amplitude adjustment or control | 4 |
20090091397 | OSCILLATING APPARATUS AND FREQUENCY CONVERT APPARATUS - An oscillating apparatus for outputting an oscillating signal includes a resonant circuit that generates the oscillating signal, an amplifier circuit that amplifies the oscillating signal generated by the resonant circuit, and feeds the amplified oscillating signal back to the resonant circuit, and an output circuit that receives the oscillating signal which is supplied to the amplifier circuit, and outputs the received oscillating signal to outside. Here, the output circuit includes a first buffer that (i) receives at an input end thereof the oscillating signal which is supplied to the amplifier circuit and outputs the received oscillating signal, and (ii) uses a capacitance component of the input end to feed a first current signal back to the amplifier circuit, wherein the first current signal has a phase displaced from a phase of a voltage component of the oscillating signal, and a second buffer that (I) receives at an input end thereof the oscillating signal which is output from the first buffer and outputs the received oscillating signal, and (II) uses a capacitance component of the input end to feed a second current signal back to the first buffer, wherein the second current signal has a phase displaced from a phase of a voltage component of the oscillating signal which is output from the first buffer. | 04-09-2009 |
20090102565 | INJECTION-LOCKED FREQUENCY DIVIDER - An injection-locked frequency divider is provided. The injection-locked frequency divider includes a voltage control oscillator (VCO) and a mixer. The VCO includes a LC resonance tank and a negative-resistance generator for generating a differential oscillation signal including a first and a second oscillation signals. The LC resonance tank adjusts a VCO reactance and resonates for generating the differential oscillation signal. The negative-resistance generator coupled to the LC resonance tank eliminates an equivalent resistance generated by the LC resonance tank and maintains the VCO to continuously oscillate. The mixer has a first and a second local input terminals respectively receiving the first and second injected signals included in a differential injected signal, and the first and second radio frequency input terminals respectively receiving the first and second oscillation signals for mixing the differential injected signal with the differential oscillation signal to adjust the output frequency of the differential oscillation signal. | 04-23-2009 |
20090153256 | FREQUENCY GENERATOR - There is provided a feedback circuit including: an oscillator generating an oscillation frequency signal; a mixer unit having an input terminal, a feedback terminal, and an output terminal and outputting a frequency signal through the output terminal, the frequency signal obtained by adding or subtracting frequency of a feedback signal, input through the feedback terminal, to or from frequency of the oscillation frequency signal input through the input terminal from the oscillator; a first frequency divider dividing the frequency signal output from the mixer unit at a division ratio of N (N is a multiple of 2) to generate an output signal; and a feedback circuit adjusting the output signal of the first frequency divider for the first frequency divider to output a frequency signal in a desired band and feeding back the adjusted signal to the feedback terminal of the mixer unit. | 06-18-2009 |
20130033330 | FREQUENCY SYNTHESIS AND NOISE REDUCTION - A frequency synthesiser and oscillator are disclosed for reducing noise in processed signals. The synthesiser and oscillator comprise an array of frequency dividers adapted to receive an input signal, which is derived from a single signal source having a prescribed frequency. The synthesiser and oscillator further comprise at least one frequency multiplier coupled to at least one of the frequency dividers, such that in use, the dividers and the at least one multiplier are operable to generate a plurality of frequencies which are coherent with the prescribed frequency. A regulated power supply is also disclosed comprising a filter and first and second regulators, for reducing noise in the output voltage of the power supply. | 02-07-2013 |
331041000 | Frequency stabilization | 1 |
20120229220 | Temperature compensated oscillator including MEMS resonator for frequency control - Disclosed is an oscillator that relies on redundancy of similar resonators integrated on chip in order to fulfill the requirement of one single quartz resonator. The immediate benefit of that approach compared to quartz technology is the monolithic integration of the reference signal function, implying smaller devices as well as cost and power savings. | 09-13-2012 |
331042000 | With particular signal combining means (e.g., cavity mixer) | 1 |
331043000 | With filter in mixer output circuit | 1 |
20110006849 | HARMONIC REJECTION MIXER AND HARMONIC REJECTION MIXING METHOD - Provided are a harmonic rejection mixer and a harmonic rejection mixing method. A plurality of oscillator signals having a ⅓ duty cycle and uniform phase differences may be generated and a differential or quadrature mixer with harmonic rejection may be realized by using the oscillator signals. | 01-13-2011 |