摘要:
An oscilloscope to sequentially store, process and display an electrical input signal according to various signal events and characteristics. The oscilloscope is physically and functionally modular having both selectable hardware configurations from among various "plug-in" modules and selectable processing and display features chosen from among a predetermined selection by software control contained, in part, within the plug-in modules. The particular control settings, as well as a representation of the signal itself, is recorded on a removable storage device, such as a magnetic disc. High frequency signals are sampled, digitized and stored in a high speed intercascaded signal memory, independent from the program and data memory associated with the oscilloscope signal processing.
摘要:
A circuit for precisely measuring very high-speed recurring waveforms includes a comparator coupled between an analog input terminal and a successive approximation register. A digital-to-analog converter is also coupled between the digital output circuit of the successive approximation register and the second input terminal of the comparator, and a high-speed digital latch is coupled between the output of the comparator and the input of the successive approximation register for freezing the output states of the comparator upon the application of hold signals from a hold signal generator means, so that a first sequential series of hold signals are applied to the latch, coincident in time with the occurrence of a first portion of the recurring analog waveforms being measured, until the successive approximation register completes its measurement of the voltage amplitude of such first portion. A counter in the hold signal generator means is thereafter stepped, to enable the measurement of a second portion of the recurring waveform, adjacent the first portion, to be carried out by the application of a second series of hold signals, each coincident in time with the occurrence of the second portion of the waveform, until the voltage amplitude at the second portion is evaluated by the iterative operation of the successive approximation register. The counter is again stepped, and the process is repeated until numerous points upon the recurring waveform under examination are measured.
摘要:
A D/A converter for converting a digital signal having a number of bits to an analog signal. The converter is fabricated in an integrated circuit digital array including a register for storing the particular number of bits, a buffer circuit for receiving those bits from the register, and an analog current switching network. The analog current switching network includes a number of current switching circuits, each of which provides the proper current output in response to the delivery of an associated bit from the buffer circuit. Each current switching circuit includes an emitter coupled switch circuit having two pluralities of parallel connected transistor cells with the bases of one of the plurality of transistor cells connected with the buffer circuit and the bases of the other of the plurality of transistor cells connected with the current switching circuit. The current switching circuit includes a first transistor cell with its emitter connected to the base of the other of the plurality of transistor cells in the emitter coupled switch circuit. A voltage summing network responsive to the current output from the analog current switching network provides voltages representative of the bit presented by the associated buffer circuit.
摘要:
A full floating point vector processor includes a master processing unit having DMA I/O means, a wide bandwidth data memory having static RAM and/or interleaved dynamic RAM, an address generator operative to provide address generation for data loaded in the data memory, a concurrently operating pipeline control sequencer operative to provide fully programmable horizontal format microinstructions synchronously with the addresses generated by the address generator, and a pipelined arithmetic and logical unit responsive to the addressed data and to the synchronously provided microinstructions and operative to evaluate one of a user selectable plurality of computationally intensive functions. The address generator, the pipeline controlsequencer, and the master processing unit are configured in parallel. The address generator includes means operative to provide pipeline input and output data dependent address generation. The microinstruction controlled pipelined arithmetic and logical unit includes two register files controllably interconnectable over feedforward and feedback data flow paths, a user selectable fixed or floating point format multiplier, a user selectable fixed or floating point format arithmetic and logical unit, and a sign latch coupled between the arithmetic and logical unit and one of the register files. The sign latch microinstruction control is operative to provide the arithmetic and logical unit with a data dependent decison making capability. A microinstruction controlled write address FIFO and a read address FIFO are coupled to the data memory.
摘要:
An analog-to-digitial converter of the dual slope type wherein simultaneous integration of two input signals is achieved to provide a digital output substantially immune to disturbances affecting both signals. First and second dual slope converter circuits are employed, each receiving a respective analog signal. During conversion of the first signal, integration of the second signal is accomplished such that a digital output signal is provided representing the integrated instantaneous ratio of the two input signals and which is substantially free of disturbances affectng both of signals which may be introduced during a conversion cycle.
摘要:
For use in an electronic digitizer such as employed in an electronic weighing system, a circuit for detecting motion and providing a digital output signal. The circuitry includes a dual slope analog-to-digital converter having means for retaining a representation of the integrated analog level of a present and previous conversion cycle, the levels being representative of sampled data. The stored amplitudes are compared to provide an analog difference signal, and an output signal representative of measured weight is provided only when the difference signal is less than a predetermined reference threshold.
摘要:
A servo control module for a motion control system with a plurality of individual servo control modules. The servo control module includes a single axis servo drive. The servo control module further includes a set of input pins configured to receive motor state information of motors controlled by single axis servo drives of all of the other of the plurality of servo control modules over a dedicated inter-drive network each servo update cycle. The servo control module further includes a set of output pins configured to transmit the motor state information of a motor controlled by the single axis servo drive and the received state information over the inter-drive network of motors each servo update cycle.
摘要:
Scanning systems may include a stator, a rotor supporting at least one radiation source and at least one radiation detector rotatable with the rotor, and a motivator operatively connected to the rotor. The stator, the rotor, the at least one radiation source, and the at least one radiation detector may be located within a housing. A conveyor system may extend through the housing and the rotor. A shielding system including a series of independently movable energy shields sized, shaped, and positioned to at least partially occlude a pathway along which the conveyor system extends may extend from an entrance to the housing, through the rotor, to an exit from the housing. A control system may be configured to cause the shielding system to automatically and dynamically move individual energy shields in response to advancement of one or more objects supported on the conveyor system.
摘要:
Among other things, a computed tomography (CT) imaging modality is provided. The imaging modality includes a radiation source that emits radiation. The imaging modality includes a detector array that detects at least a portion of the radiation. The imaging modality includes a rotating structure that rotates about an axis. The rotating structure includes a first support portion having a first shape. The rotating structure includes a second support portion having a second shape different than the first shape. The radiation source and the detector array are mounted to the second support portion.
摘要:
Among other things, an anti-scatter collimator is provided including a first layer defining a first retaining member at a first surface. A second layer defines a second retaining member at a first surface that faces the first surface of the first layer. A septum is disposed between the first layer and the second layer and physically contacts the first retaining member and the second retaining member. The first retaining member and the second retaining member maintain a position of the septum relative to the first layer and the second layer. The septum has a third attenuation coefficient that is greater than a first attenuation coefficient of the first layer and a second attenuation coefficient of the second layer. An end support is attached to the first layer and to the second layer. The end support borders an end of the septum.