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| Number | Title | Issue Date |
| 7340357 | Arbitrary waveform generator with configurable digital signal processing unit An arbitrary waveform generator including a digital signal procession unit and a memory. The digital signal processing unit may be configurable to interconnect a plurality of processing components in different configurations to process data received from the memory ... | 03/04/2008 |
| 7340541 | Method of buffering bidirectional digital I/O lines A system and method for buffering bidirectional digital input/output (I/O) lines. The system (e.g., data acquisition system) may comprise a device including circuitry for buffering bidirectional digital lines. A first integrated circuit (IC) of the device includes a... | 03/04/2008 |
| 7332935 | Driver with variable output voltage and current A driver circuit with variable output voltage and current. A source input terminal of the driver circuit may receive a source control signal. A voltage control circuit may drive one of the terminals of a first switch to a source voltage. If the source input terminal... | 02/19/2008 |
| 7325171 | Measurement and data acquisition system including a real-time monitoring circuit for implementing control loop applications A measurement and data acquisition system including a real-time monitoring circuit for implementing control loop applications. The system control loop may include the real-time monitoring circuit, a data acquisition device, a processing unit, and a plurality of subs... | 01/29/2008 |
| 7324356 | Common-mode current cancellation with digital pulses for isolated applications A mechanism for reducing common-mode current in a system including a first subsystem and an isolated subsystem. The isolated subsystem may receive the common-mode current from the first subsystem via an isolation mechanism. The isolation mechanism (e.g., a transform... | 01/29/2008 |
| 7315172 | Method for measuring spectral noise densities beyond instrument capability with deterministic confidence levels A mechanism for measuring noise densities below the noise floor of a measuring instrument. The measuring instrument may first acquire a fully-averaged reference spectral noise density trace and estimate corresponding reference statistical parameters. Based on the re... | 01/01/2008 |
| 7305570 | Failsafe slave mechanism for mission critical applications In one embodiment, a monitoring device (e.g., a slave device) may be configured to perform a plurality of monitoring functions. For example, the monitoring device may comprise a watchdog timer configured to monitor communications between the processing unit (e.g., a... | 12/04/2007 |
| 7294976 | Split power supply subsystem with isolated voltage supplies to satisfy a predetermined power limit A power subsystem including a mechanism for satisfying a predetermined power limit in a computer system. The power subsystem may include a split power supply and a voltage regulator. The split power supply may include at least a first voltage supply line and a secon... | 11/13/2007 |
| 7239184 | Low power and high efficiency voltage-to-current converter with improved power supply rejection A low power and high efficiency voltage-to-current (V/I) converter designed with few parts and having improved power supply rejection. The V/I converter may include an op-amp, a MOSFET, and a first and second voltage dividers. The first voltage divider circuit may i... | 07/03/2007 |
| 7239257 | Hardware efficient digital control loop architecture for a power converter A power converter including a hardware efficient control loop architecture. Error detection circuitry may generate an error signal based on the difference between a power converter output voltage and a reference voltage. An oversampling ADC may digitize the error si... | 07/03/2007 |
| 7205810 | Skew tolerant phase shift driver with controlled reset pulse width A phase shift driver for phase shifting an input clock signal at a first phase to generate an output signal at a second phase without missing subsequent input signals. Input logic circuitry of the phase shift driver may receive an input signal at a first phase. Outp... | 04/17/2007 |
| 7183854 | Programmable gain instrumentation amplifier including a composite amplifier for level shifting and improved signal-to-noise ratio A PGIA for use in measurement devices (e.g., data acquisition device) including a composite amplifier for level shifting and improved signal-to-noise ratio. The composite amplifier may level shift from a constant common mode voltage to a lower common mode voltage wi... | 02/27/2007 |
| 7146283 | Calibrating analog-to-digital systems using a precision reference and a pulse-width modulation circuit to reduce local and large signal nonlinearities A calibration unit and technique for calibrating A/D systems (e.g., data acquisition devices) using a pulse-width modulation (PWM) circuit to reduce nonlinearity. The calibration unit may be coupled to an analog-to-digital module (ADM) of the A/D system. The PWM cir... | 12/05/2006 |
| 7095280 | Programmable gain instrumentation amplifier having improved dielectric absorption compensation and common mode rejection ratio A PGIA for use in measurement devices (e.g., data acquisition device) having improved dielectric absorption (DA) compensation and common mode rejection ratio (CMRR). When a step function is applied to an input of the PGIA, a first and a second DA compensation circui... | 08/22/2006 |
| 7064994 | Dynamic memory throttling for power and thermal limitations In one embodiment, a memory controller is coupled to a memory subsystem and controls accesses to the memory subsystem. In addition, a temperature sensor is positioned to detect a temperature associated with the memory subsystem. In this embodiment, the memory contro... | 06/20/2006 |
| 7042376 | Scanning front end using single-pole, double-throw switches to reduce settling time A scanning front end of a measurement device using single-pole, double-throw switches (SPDT) to multiplex input signals into signal conditioning circuitry. The scanning front end may also include N input channels and N input resistors, which may be connected to the ... | 05/09/2006 |
| 7009443 | Method and circuit for fuse programming and endpoint detection In one embodiment, a system comprises a programming unit coupled to at least one programmable fuse and configured to program the programmable fuse. In addition, the system comprises a monitoring circuit coupled to the programmable fuse and configured to monitor elec... | 03/07/2006 |
