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8102193 |
Current sensing circuit
A current sensing circuit includes a power transistor, a sensing transistor configured to copy a current flowing through the power transistor at a predetermined ratio, a current sensing resistor...
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7940107 |
Clamp circuit for clamping inrush voltage induced by hot plugging and related chip
An inrush voltage clamping circuit for an electronic device for clamping an inrush voltage induced by hot plugging is disclosed. The clamp circuit includes a buffer unit and a clamp unit. The...
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7843246 |
Clamp control circuit having current feedback
In accordance with an aspect of the present invention, an external FET driving circuit includes a driving portion, a drain-to-gate clamp portion and a current feedback portion. The driving portion...
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7733133 |
Power switch circuit having variable resistor coupled between input terminal and output transistor and changing its resistance based on state of output transistor
A power switch circuit includes an output transistor which is connected between a first power supply terminal and an output terminal, and drives a load, an abnormality detecting circuit which...
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7633321 |
Driver circuit; electronic circuit having driver circuit and corresponding method
A driver circuit includes an output, at least one transistor including a load section coupled between the output and a supply voltage, and a circuit coupled to a control terminal of the at least...
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7570098 |
Active voltage-clamping gate driving circuit
An active voltage-clamping gate driving circuit comprises a difference comparison circuit for receiving a reference voltage, a gate driving signal, and a preset voltage level, and outputting a...
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7525366 |
Offset compensation using non-uniform calibration
Methods and systems for offset compensation using calibration are provided. Embodiments enable offset compensation using non-uniform calibration. Embodiments enable calibration schemes configurable...
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7423471 |
Backflow preventing circuit capable of preventing reverse current efficiently
This patent specification describes a backflow prevention circuit which includes a first switch configured to conduct or to shut down a current path from an input terminal to an output terminal, a...
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7348809 |
Input buffer
In one embodiment, the present invention includes an input buffer with a common gate amplifier having input terminals coupled to receive an incoming common mode voltage. The common gate amplifier...
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7205818 |
Current loop drive module with dynamic compliance voltage
A current loop drive module includes a drive circuit and a compliance voltage controller. The drive circuit is configured to receive a compliance voltage and operable to generate a current loop...
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7084692 |
Control of a thyristor of a rectifying bridge
A method and a circuit for controlling at least one thyristor constitutive of a rectifying bridge with a filtered output, including closing the thyristor when the voltage thereacross becomes...
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7027307 |
Clock routing in multiple channel modules and bus systems
An apparatus is provided, which includes a memory interface circuit, a clock signal generating circuit, and a plurality of memory circuits. The memory circuits are operatively coupled and arranged...
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7005913 |
I/O buffer with wide range voltage translator
In accordance with an aspect of an input/output device for providing fast translation between differential signals from a core of an integrated circuit and higher voltage signals that are external...
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6946910 |
Configurable feedback path in an amplitude control system
A configurable feedback path is included in an amplitude control system having a signal source and an amplitude controller, and provides accurate tracking between a signal provided at a test port...
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6927630 |
RF power detector
A method and apparatus is provided for detecting the output power of an RF power amplifier for purposes of controlling the output power. A circuit for generating an output power control signal...
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6924687 |
Voltage tolerant circuit for protecting an input buffer
An invention is disclosed for protecting an input buffer. A current from a p-supply to an input buffer is lowered when an input voltage to the input buffer is tolerant HIGH. The p-supply being a...
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6737905 |
Clamp circuit
The clamp circuit clamps an input voltage at prescribed higher and lower clamp voltages which are stabilized under a temperature fluctuation. Transistors Q12 and Q14 are switched on in their linear...
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6731150 |
Amplifiers with variable swing control
An amplifying circuit includes an amplifying stage for receiving input signals to generate output signals. A swing detect unit detects signal levels of the output signals. A clamp unit variably...
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6717449 |
Variable resistance circuit and application circuits using the variable resistance circuit
A variable resistance circuit and application circuits using the same capable of offsetting the variance in the manufacture of integrated circuit and the influence of ambient temperatures,...
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6710632 |
Drive circuit
A drive circuit including circuitry that can be easily adjusted, the output drive current can be kept balanced, and high-precision drive current can be supplied to the load circuit. Clamp circuit...
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6633191 |
Clock buffer with DC offset suppression
A circuit includes a differential amplifier providing a differential signal to a voltage follower. The output of the voltage follower is fed back through resistors to an additional differential...
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6542018 |
Current mode step attenuation control circuit with digital technology
A current mode step attenuation control circuit with digital technology. The circuit includes several stages of serially connected current attenuation circuits, each having a digital control input...
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6525568 |
Circuit for the demodulation of the logic signal transmitted by analog channels
In digital signal demodulation and detection circuits, especially digital radio signal reception and processing circuits, the signals are received in analog form and have to be converted into logic...
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6504418 |
Using thick-oxide CMOS devices to interface high voltage integrated circuits
A high voltage tolerant CMOS input/output interface circuit. In this circuit, a process feature called “dual-gate” or “thick-oxide” process is used on any devices that will be exposed to high vo...
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6459321 |
Gate protection clamping circuits and techniques with controlled output discharge current
Gate protection clamping circuits and techniques with controlled output discharge current are provided. Circuits and methods according to the invention are implemented to relatively rapidly...
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6441670 |
5V-tolerant receiver for low voltage CMOS technologies
Receiver circuit providing interface between a legacy system sourcing logic signals including high logic level signals at first voltage levels to semiconductor IC devices operating at second...
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6362678 |
Circuit for reducing rise/fall times for high speed transistor logic
An improved output driver for HSTL includes a bias control transistor to absorb current leaking through the base-collector capacitance of the drive transistor and maintain the base voltage on the...
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6329849 |
Apparatus and method for converting differential voltage to fully balanced currents
The apparatus for converting a differential input voltage to two fully balanced output currents is achieved by providing a common mode control circuit of a simplified circuit construction to an...
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6294941 |
Semiconductor integrated circuit including voltage follower circuit
A voltage follower and a semiconductor integrated circuit including the voltage follower. In the voltage follower, an output voltage Vout from a source follower output transistor 8 is negative fed...
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6281720 |
Electric integrated circuit
A circuit arrangement which, in accordance with its mode of control, operates either as input circuit or as output circuit and includes a series connection with an inverter stage, a filter stage, a...
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6271705 |
Data output circuits having enhanced ESD resistance and related methods
A data output circuit includes a periphery circuit connected between a supply voltage and a first ground voltage line and an output driver connected between a supply voltage and a second ground...
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6229371 |
Clamp circuit
The present invention makes it possible to prevent feedback loops from causing oscillations in clamp circuits. When a video signal is input through a capacitor into a first inverting input terminal...
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6225849 |
High speed, high precision, power supply and process independent boost level clamping technique
A boost level clamping circuit and a method for clamping a boosted wordline voltage from a booster circuit used in a semiconductor memory device is provided which is power supply and process corner...
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6188264 |
Automatic threshold level control circuit
An automatic threshold level control circuit is provided which is capable of controlling the threshold level without causing the DUTY deterioration.The automatic threshold level control circuit...
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6181187 |
Circuit for auto-centering control loop bias currents
A method and circuit for automatically centering the control loop bias current by sensing and "memorizing" the total steady state bias current used by the function block (VGA or VCO) through the...
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6018262 |
CMOS differential amplifier for a delta sigma modulator applicable for an analog-to-digital converter
An analog-digital converter includes a ΔΣ modulator, a digital filter, a high-pass filter and a multiplier which are connected in series. Analog input is converted into serial-bit strings by the Δ...
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5986493 |
Clamping circuit and method for clamping a voltage
A clamping circuit (100) is provided for controlling an external switch, using a control signal, in response to monitoring a voltage at a first node. When the voltage at the first node exceeds a...
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5917346 |
Low power current to frequency converter circuit for use in implantable sensors
A low power current-to-frequency converter circuit provides an output frequency signal FOUT having a frequency that varies as a function of a low level analog input current signal. The analog input...
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5909127 |
Circuits with dynamically biased active loads
This invention provides a circuit and method to replace the passive resistive or statically biased active load devices with dynamically biased active load devices. This allows the load devices to...
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5892376 |
High-speed/high-slew-rate tri-modal all bipolar buffer/switch and method thereof
A high-speed/high-slew-rate tri-modal all bipolar buffer/switch includes a unity-gain amplifier, a voltage source, and a maximum level detector and a minimum level detector adjusting a current...
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5867514 |
Laser wavelength control circuit having automatic DC offset and gain adjustment
An automatic gain control circuit in the feedback path for a laser wavelength control circuit is described herein. This gain control circuit automatically adjusts the amplification of the analog...
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5821745 |
Sensor signal processor having accurate digitizing capabilities
Magnetoresistive elements are disposed facing a gear to form a sensor for detecting rotation of the gear. The signal output from MRE sensor is an alternating amplitude signal. An operational...
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5812021 |
Semiconductor integrated circuit device having an internal power supply circuit capable of stably maintaining output level against load fluctuation
An object is to provide a semiconductor device having an internal power supply circuit capable of supplying stable internal power supply voltage while not increasing layout area. A differential...
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5796278 |
Circuitry for controlling load current
Circuitry for controlling load current, in accordance with the present invention, utilizes a load drive transistor configuration operable to provide a first load current path having a first...
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5793241 |
High speed active op-amp clamp
An op amp clamp for charging or discharging a capacitor prevents the voltage on the capacitor from going beyond a reference voltage determined by a reference clamp voltage applied to an input of a...
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5777503 |
Pulse width modulation bias to minimize effect of noise due to ramp switching
A control system using pulse width modulation, current-mode control to regulate a flyback converter for small input currents. The control system generates a ramp voltage indicative of an input...
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5767724 |
Electronic clamping circuit
An electronic clamping circuit is provided. In one preferred embodiment, the clamping circuit includes a pair of diodes connected in series, both having the same bias, which are shunted across a...
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5739712 |
Power amplifying circuit having an over-current protective function
An amplifying circuit has an amplifying section including an operational amplifier for receiving an input signal and a power transistor for receiving the output of the operational amplifier to...
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5731730 |
Zero level setting circuit for A/D converter in a magnetic disk drive
In a magnetic disk drive in which an analog signal having symmetrical positive and negative odd levels with respect to a zero-level is read out of a magnetic disk by a head, the read analog signal...
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5731729 |
Voltage transient suppression circuit for preventing overvoltages in power transistor systems
An apparatus for suppressing voltage transients across a first transistor is described. The first transistor has a first terminal, a second terminal, and a gate terminal, and is characterized by an...
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