摘要:
An electro-mechanical switching system for selecting one of a plurality of selectable items, such as channels, comprising an uncoded rotary switch having N movable terminals and N discrete angular positions, a flip-flop or other memory device coupled to the switch, one or more up/down counters and a display for indicating the particular item selected.
摘要:
A memory-type control system for producing and storing a control signal which is used in an automatic adjustment system. A signal, having a parameter to be controlled, is provided; and a detecting circuit detects when the parameter is within a predetermined range. An UP/DOWN counter counts clock pulses and is responsive to the detecting circuit for counting in one direction when the detected parameter is greater than the predetermined range, for counting in a second direction when the detected parameter is less than the predetermined range and for ceasing its counting when the detected parameter is within the predetermined range. A parameter control circuit uses the count of the counting means as a control signal to adjust the parameter so as to bring said parameter within the predetermined range. A typical application of the automatic adjustment system is a white-balance control system for use with video camera apparatus.
摘要翻译:一种用于产生和存储在自动调节系统中使用的控制信号的存储器型控制系统。 提供具有待控制的参数的信号; 并且检测电路检测何时参数在预定范围内。 UP / DOWN计数器对时钟脉冲进行计数,并且当检测到的参数大于预定范围时响应于检测电路在一个方向上进行计数,以便当检测到的参数小于预定范围时在第二方向上计数并停止 当检测到的参数在预定范围内时,其计数。 参数控制电路使用计数装置的计数作为控制信号来调整参数,以使所述参数在预定范围内。 自动调节系统的典型应用是与摄像机装置一起使用的白平衡控制系统。
摘要:
Apparatus for generating pulses having selectable pulse width and selecta pulse repetition interval which may be used as a pulse repetition interval generator in a radar signal simulator. Each pulse is initiated by a clocked counter when it reaches a predetermined count from a preselected initial count. The initial count is determined by data stored in a read-only-memory which is selectably loaded into the counter to provide a variable initial count. Another clocked counter which is enabled by the leading edge of the pulse then terminates the pulse when it reaches a predetermined count from a preselected initial count.
摘要:
A data system and method for entering, storing and displaying a desired digital time which replaces a conventional input keyboard, rotary switch, or thumbwheel switch for a digital timer or clock. This system processes the voltage from a manually positioned wiper of a potentiometer through an inexpensive analog-to-digital converter, displays the digital data to the operator for identification, and holds the data for further processing. The operator repositions the wiper so as to sequentially display a digital time in response to a static or steady state digital signal until the desired digital time is displayed.
摘要:
A mile post and mileage indicator for maintaining the exact mile post position of a vehicle while said vehicle is travelling upon a roadway containing designated mile post signs, which increase or decrease in a particular direction. This indicator may also be used to indicate exactly how far the vehicle has travelled or how much further it must travel before it reaches a certain destination. The indicator contains electronic circuits for presetting a specific mileage onto a display and for increasing or decreasing the mileage display in conjunction with a pulser unit placed in the speedometer cable of the vehicle. A calibration unit is utilized which corrects minor errors in signals received from the vehicle transmission.
摘要:
A counter stage includes a clocked transmission gate which, when turned on, couples the output of the stage back to its input. A resetting circuit is connected to the input of the stage for selectively clamping the input to a fixed voltage level representative of a logic one or a logic zero. The resetting circuit is enabled only when the clocked transmission gate is turned off, whereby no current can flow from, or to, the output via the resetting means. This enables high speed of reset since the input of the stage is then easily discharged (or charged) to the selected fixed level via the resetting circuit.
摘要:
A continuous counting system includes a multistage binary counter for deriving the frequency of an input signal by counting the cycles thereof occurring during predetermined timing intervals. A control circuit, responsive to the input signal and to a timing reference signal, develops an output pulse during each period of the timing reference signal extending between a logical transition of predetermined polarity of the reference signal and the subsequently occurring nth logical transition of like polarity of the input signal. The output pulses are coupled for presetting the binary counter to the count n whereby counts beginning with n+1 are accumulated during the remainder of the timing interval.
摘要:
This invention concerns a programmable counter which can be preset to provide an output indication one pulse after the count of the incoming signal pulse train has reached the integer M, where M equals any binary real number over the range (0, 1, 2, 4, 8, 16, . . ., 32,768). The programmable counter can be preset to any one of the binary numbers using a 4 digit word.
摘要:
A variable mode counter has a control means switchable between first and second states, a source of periodically occurring step signals, a counter means, and incrementing means under the control of the control means for incrementing the count in said counter means by one for each of the periodically occurring step signals when the control means is in the first state and for incrementing the count in the counter means by two for each of the periodically occurring step signals when said control means is in said second state. There are also included initializing means for clearing the counter means to a first count when the control means is in the first state and alternatively to the first count or to a second count when said control means is in the second state whereby the counter means counts by odd numbers or even numbers.
摘要:
A pulse sequence generator for the production of pulse sequences whose pulse count depends on a geometrical value, such as a distance or an angle, comprises a first pulse generator which generates a sequence of pulses the freqency of which depends on the geometrical value and a time signal generator which controls the duration of the sequence of pulses. The time signal generator comprises a second pulse generator of the same design as the first pulse generator and a counter which switches on the first pulse generator for the duration of a predetermined number of pulses from the second pulse generator. The frequency ratio of the two pulse generators is variable by the geometrical value.