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JP2014049888A |
To provide an oscillation circuit that, exemplarily, consumes less power and stabilizes the frequency of a periodic pulse of oscillation.According to one embodiment, the oscillation circuit provided includes a current source, a first cap...
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JP5439694B2 |
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JP5436455B2 |
Disclosed is a harmonic rejection mixer that makes it possible to suppress high-frequency response, while keeping the number of gm elements from increasing. In a harmonic rejection mixer that regulates the waveform of an output signal by...
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JP2014033425A |
To provide an oscillator capable of achieving a clock signal with a constant duty ratio by generating a voltage toggled using a voltage having no relation with a temperature from a band gap circuit in charging and discharging a capacitor...
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JP5423095B2 |
A sinusoidal waveform generation circuit is configured to continuously control a voltage applied to a gate of a MOSFET to change an output current in the form of a sinusoidal wave by utilizing, as an electric characteristic specific to t...
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JP5412119B2 |
A triangle wave generating circuit comprising: a pulse generating circuit configured to generate a plurality of pulse signals with the same period and with phases different from one another; and a plurality of charge/discharge circuits c...
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JP5408893B2 |
A motor drive circuit comprising: a triangle wave generation circuit configured to charge/discharge a capacitor with a charging/discharging current having a current amount corresponding to an amplitude control voltage for controlling an ...
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JP5396878B2 |
To provide a clock synchronization circuit of a switching power supply that enables the output of a signal synchronous with an internal clock or an external clock while suppressing the complication of the circuit and an increase in the n...
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JP5380418B2 |
A triangle waveform generator is set forth that comprises a capacitive element, a regulator, and a control circuit. The regulator is configured to charge the capacitive element in responsive to a first control signal and to discharge the...
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JP5381442B2 |
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JP5375753B2 |
An oscillation circuit includes a condenser, a charging/discharging part configured to switch between charging and discharging of the condenser according to a control signal, a comparator configured to compare a voltage of the condenser ...
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JP5341677B2 |
To provide a switching circuit capable of reducing noises received by a receiver. The switching circuit 1 generates a driving-voltage waveform operating a load 5 by driving a power transistor M1. The switching circuit 1 includes a receiv...
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JP2013225924A |
To provide systems and methods for more accurately controlling quality of a triangle waveform.A triangle waveform generator is set forth that comprises a capacitive element, a regulator, and a control circuit. The regulator is configured...
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JP5292226B2 |
To provide a switching circuit capable of reducing harmonic frequency components existing in a wide band, while suppressing switching loss, and to provide a method of controlling the switching circuit. The switching circuit 1 includes a ...
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JP5294019B2 |
To provide an oscillator which outputs pulse signals whose oscillation frequencies are constant. The oscillator 100 outputs a pulse signal that has a specified period by alternately switching between the open and close state of a first s...
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JP5281018B2 |
A triangular waveform generator includes a square waveform clock circuit and an integrating circuit. The integration circuit receives input from the square waveform clock circuit and generates a triangular waveform output. A feedback cir...
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JP5280449B2 |
An oscillator circuit increases and reduces signal levels of first and second oscillation signals in a complementary manner in response to a transition of a signal level of a reference clock. An oscillation control circuit compares each ...
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JP2013168786A |
To acquire a digital value with high conversion accuracy without performing calibration or the like on the digital value.A time-lag digital converter comprises an FET switch 8 which is turned on during a period in which a conversion star...
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JP5267127B2 |
[PROBLEMS] To provide, for example, a pulse input type power amplifying apparatus that can be operated at low voltage and low power, effectively suppressing generation of harmonic component. [MEANS FOR SOLVING THE PROBLEMS] The amplifyin...
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JP2013157847A |
To provide a triangular wave generation circuit that outputs a triangular signal with reduced temporal variations in the peak value.Sources of P channel transistors 11, 12 are connected to a high potential side power supply VDD, and sour...
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JP5250769B2 |
A main (sub) clock circuit comprising a first (second) capacitor, a first (second) current-supply circuit to supply to the first (second) capacitor a first (third) current for charging at a predetermined-current value or a second (fourth...
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JP5234032B2 |
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JP5222267B2 |
A current sense circuit which comprises, first, an output transistor having gate, source, and drain. The drain is coupled to a load, the source is coupled to a power rail, the gate is coupled to a control voltage such that the output tra...
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JP2013121174A |
To provide an oscillation circuit capable of outputting a slope compensation current while generating an oscillation signal.An oscillation circuit has first to third current sources each outputting a constant current. The oscillation cir...
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JP5193590B2 |
To provide an oscillation circuit capable of achieving the reduction of a circuit scale and the reduction of current consumption. The oscillation circuit includes: amplifiers (11 to 15) for generating a charging/discharging current of a ...
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JP5160268B2 |
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JP2013038744A |
To provide an oscillation circuit that outputs an oscillation signal of a highly precise frequency.The oscillation circuit includes: an RS flip-flop 11 for generating output signals Q, QB on the basis of a set signal and a reset signal; ...
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JP2013034058A |
To solve the problem of a conventional technology based oscillator circuit composed of a current source, a comparison circuit and an external capacitance that the accuracy of an oscillation frequency is degraded depending on the capacita...
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JP2013031082A |
To avoid the situation where an integrating capacitor constituting an integration circuit is saturated to disable the integration circuit from functioning normally.A third switch SW3 is connected between one terminal of an integrating ca...
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JP2013504263A |
A temperature compensated CMOS RC oscillator circuit changes the source-bulk voltage to stabilize the MOSFET's threshold voltage variation over temperature using a resistor and temperature-correlated bias current. The MOSFET's source is ...
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JP2013026881A |
To provide a PLL circuit and a method of control thereof which implement a wide range of changes in the oscillation frequency of a VCO while suppressing an increase in circuit scale.A PLL circuit 1 includes a VCO 11, control logic 14 and...
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JP5130858B2 |
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JP5091579B2 |
A load control unit for controlling the supply of an electric power to a load from battery in accordance with a pulse-width modulation control includes: a reference voltage generating unit; a first charging/discharging unit; a second cha...
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JP2012217118A |
To stabilize the response of a pulse-width modulation signal when an amplitude of an audio signal becomes excessive at a negative side.A pulse-width modulation circuit 10 comprises: a clock generation circuit 11; a differential amplifier...
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JP5040853B2 |
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JP2012156840A |
To provide an oscillation circuit that suppresses an increase in chip size by changing a frequency without requiring a large occupation area of capacitors in an integrated circuit.A configuration in which a first current source Iu for su...
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JP5002964B2 |
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JP4989106B2 |
The invention provides an oscillator circuit that reduces the dependence of an oscillation frequency on a power supply voltage. A charging and discharging circuit is a circuit switchable between an initializing operation setting an initi...
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JP4984226B2 |
To provide a pulse width modulation circuit capable of utilizing a period as a temporal reference irrespective of the period of a triangle wave signal being varied discretely. The circuit includes triangle wave producing means (11) for p...
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JP4985035B2 |
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JP4984284B2 |
To provide a voltage-controlled oscillator and a voltage controlled oscillating method capable of allowing a control voltage to be inversely proportional or directly proportional to an oscillation frequency, without complicating the conf...
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JP4976869B2 |
A pulse width modulator includes a discrete time oscillator, a data storage device, a data processing block, a counter, and a comparator. The discrete time oscillator generates a first address of bits used by the data processing block fo...
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JP4974637B2 |
A triangle waveform generator is set forth that comprises a capacitive element, a regulator, and a control circuit. The regulator is configured to charge the capacitive element in responsive to a first control signal and to discharge the...
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JP4961525B2 |
An electronic circuit comprises a delay circuit that with a chain of saw tooth delay stages (10a-d), coupled in a loop to form an oscillator for example. Each stage comprises an integrating circuit (104) and a current modulator (106) cou...
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JP4953019B2 |
A method and apparatus for generating a desired pulse waveform including: dividing the desired pulse waveform into a plurality of line segments; assigning to each line segment at least a segment identification, a segment initial value, a...
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JP4940684B2 |
A phase adjustor circuit and a phase adjusting method are capable of preventing a phase shift amount from fluctuating even if a frequency of a transmission carrier wave of a sensor signal fluctuates. A chopping wave converter circuit con...
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JP4934953B2 |
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JP2012084980A |
To provide a semiconductor circuit and a semiconductor circuit system capable of operating with a further appropriate synchronized clock when a plurality of semiconductor circuits need to operate with a synchronized clock.In a semiconduc...
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JP2012070123A |
To provide an oscillation circuit that can be operated under a low voltage while reducing current noise.An oscillation circuit 100A includes: a fixed voltage source 10 that outputs a fixed voltage Vref; a capacitive element 20; a current...
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JP2012060613A |
To provide a self excitation type oscillation circuit capable of further improving sound quality of a class D amplifier equipped with a self excitation type oscillation circuit.A self excitation type oscillation circuit SB is connected b...
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