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| Patent # | Description |
|---|---|
| US-4,833,428 |
14/12 GHz Duplexer A duplexer for use in a feed network for a satellite communications antenna is made in waveguide form and comprises two plate halves each with a pattern of... |
| US-4,833,427 |
Signal source for use with an LC tank circuit A signal source for generating a well-controlled, predictable oscillating output signal within a short, predetermined and constant start-up time is disclosed.... |
| US-4,833,426 |
Controllable frequency, temperature compensated piezoelectric oscillator
of high spectral purity A temperature-compensated piezoelectric oscillator of high-spectral purity, capable of being controlled in frequency, consists of a compensation circuit, a... |
| US-4,833,425 |
Analog macro embedded in a digital gate array A single logic gate array chip is disclosed having a first portion dedicated to the generation of one or more clock signals and the remaining portion occupied by... |
| US-4,833,424 |
Linear amplifier with transient current boost An improved linear amplifier circuit includes current mirror circuits that are cross connected in the collector circuits of input transistors for supplying... |
| US-4,833,423 |
Apparatus and method for a wide-band direct-coupled transistor amplifier In a wide-band direct-coupled transistor amplifier, the current through the power output stage must be stabilized to prevent fluctuations in the amplifier output... |
| US-4,833,422 |
Programmable gain instrumentation amplifier A programmable gain instrumentation amplifier includes first and second differential subcircuits, each of which includes first and second input transistors, a... |
| US-4,833,421 |
Fast one out of many differential multiplexer This is a one of the many differential multiplier circuits providing a fast selection of a one set of differential input signals from a multiplexity of... |
| US-4,833,420 |
Low-pass filter for integrated circuit A low-pass filtering cell is disclosed. This cell uses a distributed capacitance resistive line having an intermediate tap to which a feedback capacitor is... |
| US-4,833,419 |
Non-inductive radio apparatus A radio circuit apparatus for broadcast frequencies promotes micro miniaturization and avoids the production of unwanted radiation by incorporating tunable R-C... |
| US-4,833,418 |
Compensation circuit for nullifying differential offset voltage and
regulating common mode voltage of... An apparatus for nullifying the differential output offset voltage between the outputs of a differential amplifier and for setting the DC levels of the outputs... |
| US-4,833,417 |
Synchronous demodulation system with digital output A synchronous demodulation system with digital signal output contains a summation circuit receiving an input signal to be demodulated and a control signal. The... |
| US-4,833,416 |
QPSK/BPSK demodulator A quadraphase shift keyed (QPSK) demodulator employs a pseudo data estimation loop for reducing the loop gain variation. This demodulator has a feedback loop to... |
| US-4,833,415 |
Apparatus and method for detecting current leakage through insulating
structure Apparatus for separating the amount of resistive leakage current passing through an insulating portion (14) of an aerial boom (12) which is in contact with an... |
| US-4,833,414 |
Method and apparatus for the identification of a faulty conductor in a
multiple supply line A method of and apparatus for determining which if any phase of duplex supply lines wherein each phase w is assigned two conductors w1 and w2. The method and... |
| US-4,833,412 |
Double tuned circuit for distributed lumped capacitance observe coils An NMR probe comprises a pair of capacitively coupled inductive members forming a first circuit resonant to a relatively high rf signal and also forming a... |
| US-4,833,411 |
Methods of imaging solids by NMR techniques A sequence of a pair of r.f. pulses (90.sub.x .degree. and 90.sub.y .degree.) is applied to a solid being imaged with a time interval (.tau.) after each pulse. A... |
| US-4,833,410 |
System of coils for producing magnetic field gradients of very uniform
polarization in an imaging or... A system of coils is disclosed for the production of imaging by nuclear magnetic resonance of gradients Gx and Gy. The system of coils is disposed on the outer... |
| US-4,833,409 |
Apparatus for dynamically disabling an NMR field coil A detunable coil assembly for an NMR imaging system has a cylindrical cage coil comprising two spaced-apart conductive end loops with a plurality of conductive... |
| US-4,833,407 |
Scan time reduction using conjugate symmetry and recalled echo A spin echo (52) and a gradient echo (60) are generated in each magnetic resonance sequence repetition. The spin echo is phase encoded by a phase encode gradient... |
| US-4,833,406 |
Temperature compensated Hall-effect sensor apparatus A temperature compensated Hall-effect sensor apparatus is disclosed which senses the position of a moving body and provides an output signal indicative of the... |
| US-4,833,405 |
Shaft failure monitoring system using angled rotating teeth and phase
detection A shaft monitoring system for sensing axial movement of a shaft, especially in a gas turbine engine, comprises a toothed wheel attached to and rotatable with the... |
| US-4,833,404 |
Test probe for surface mounted leadless chip carrier A test probe for a surface mounted leadless chip carrier is disclosed. The probed includes specially designed connector pins which allow size reductions in the... |
| US-4,833,403 |
Method and apparatus for measuring settling characteristics of a device
under test by using a measurement... A method and an apparatus for measuring settling characteristics of a device under test. A measurement system for measuring an input signal by sampling and... |
| US-4,833,402 |
Connector assembly for a circuit board testing machine, a circuit board
testing machine, and a method of... A machine for testing a circuit board of an electrically insulating material includes circuit tracks of an electrically conductive material arranged on one or... |
| US-4,833,401 |
Electrical measuring instrument for high voltage power measurements A current-comparator technique for obtaining an instrument for accurate high voltage power measurements at very low power factors is described. The quadrature... |
| US-4,833,400 |
High frequency multi-range attenuator having a high input impedance Attenuator having a high input impedance and several switching levels for high frequencies and oscilloscope and active probe comprising such an attenuator. A... |
| US-4,833,399 |
DTMF receiver A DTMF receiver (10) recognizes each of a plurality of multi-frequency tones, each tone centered on a predetermined standard frequency. Two digital bandpass... |
| US-4,833,398 |
Electric water heater analyzer An electric testing system to be attached to a water heater to permit instantaneous testing of the operability of each heating element comprising a separate... |
| US-4,833,397 |
Tester for verification of pulse widths in a digital system A tester-verifier apparatus operates to select a single one of a plurality of system clocks to verify that the clock width falls between accepted parameters.... |
| US-4,833,396 |
Lead frame short tester Disclosed herein is a method and apparatus for performing a non-invasive electronic testing of hybrid circuit packages before components are mounted within the... |
| US-4,833,395 |
Semiconductor device having a test circuit A semiconductor device comprises a test signal generating circuit for generating a test signal having an arbitrary frequency, a first buffer for selectively... |
| US-4,833,394 |
Ion beam profile analyzer with noise compensation An apparatus for producing a signal that is representative of the profile of an ion beam and compensates for the system noise of the ion beam profile scanner... |
| US-4,833,393 |
Circuit arrangement for capacitance or admittance measurement The circuit arrangement is used for capacitance or admittance measurement by the principle of apparent current measurement in that to the capacitance or... |
| US-4,833,392 |
Apparatus and method for measuring electrostatic polarization An apparatus and method for measuring the electric properties of solid matter which provides data for determining the polarizability of the electron... |
| US-4,833,391 |
Method and apparatus for charging lead-acid-accumulators The charging apparatus for lead-acid-accumulators controls the charging current and the charging voltage above the gassing voltage level according to a linearly... |
| US-4,833,390 |
Charge completion detector A charge completion detector comprises a thermoelectric detecting element outputting a thermally generated electromotive force in correspondence with the rise of... |
| US-4,833,389 |
Current source inverter control system for load commutated induction
motor drive In a load commutated induction motor drive stability is achieved in a runaway situation by generating in response to the motor speed reference signal a signal... |
| US-4,833,388 |
Method of and arrangement for controlling an asynchronous motor A method and an arrangement for controlling an asynchronous motor fed via a frequency converter. The control is accomplished with a model implemented in a... |
| US-4,833,387 |
Control circuit for running a polyphase synchronous motor in a d-c
voltage network A control circuit for operating a synchronous motor with a polyphase armature winding in a d-c voltage network comprises a switch device for successively... |
| US-4,833,386 |
Apparatus and method for braking an electric motor An electric motor is coupled to the power lines by thyristors. The motor is braked by triggering the thyristors at the proper times to produce a electro-magnetic... |
| US-4,833,385 |
Method for the phase synchronization of step-drive controlled equipment A method for the phase synchronization of step-drive-controlled equipment, in particular of optical modulation devices for multiple-beam ... |
| US-4,833,384 |
Syringe drive assembly An assembly is described for accurately and precisely controlling the position of a plunger in a syringe to deliver precise fluid volumes. The assembly includes... |
| US-4,833,383 |
Means and method of camera space manipulation A means and method for camera space manipulation includes a manipulator arm extending from a base to an outward end. The arm is movable through a work space to... |
| US-4,833,382 |
Method and apparatus for use in microscope investigations In a method for visually inspecting a sample through an objective lens of a microscope, a slide carrier attached to the microscope stage is automatically... |
| US-4,833,381 |
Optical automatic seam tracker and real time control system for an
industrial robot A control processor in a robotic system treats optically sensed locations along the seam path ahead of the tool, which are classified in relation to elapsed... |
| US-4,833,380 |
Hoist motor protection In an elevator system in which the elevator cars are moved by a hoist motor with a brake and the hoist motor is energized by controls to cause energization of... |
| US-4,833,379 |
Motor control fail-safe circuit A fail-safe circuit is disclosed for use with an intermittently operated d.c. motor connected by means of a circuit breaker to a power supply, wherein a control... |
| US-4,833,378 |
Motor control method and apparatus A motor control method and apparatus in which when a motor rotating at prescribed RPM is to be stopped, a reverse maximum voltage is applied to the motor to... |
| US-4,833,377 |
Current leakage reduction circuit An offset current which is 180.degree. out of phase with the leakage current for a motorized bed circuit is created through the use of an additional transformer... |
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