Extremely accurate automatic frequency control circuit and method therefor

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The Motorola, Inc. patent solves the following problem:

The present invention relates generally to automatic frequency control circuit, frequency detection circuit, and the like. In particular, the present invention relates to a very precise frequency resolution circuit achieves a closed state within a short time interval. More particularly, the present invention relates to a circuit resolution frequency which tolerates both amplitude and pulse modulation signal whose frequency this purpose.

Our analysis of this patent is as follows:

Motorola, Inc.’s patent US 4715001 A deals with Extremely accurate automatic frequency control circuit and method therefor.
An automatic frequency control circuit capable of addressing the frequency of an incoming signal exceeding the level of accuracy and to allow amplitude and pulse modulation signal future is revealed. Two negative feedback loops are used. A coarse adjustment feedback loop purpose frequency signal coming into the authority of a fine change feedback loop. A computer is a common element in the loops and make decisions about how to resolve the future of a frequency signal using coarse or fine adjustment loops. Phase difference between a signal derived from the incoming signal and a reference signal sample controllable lat time out to determine frequency changes in the fine changes loop.

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Coprocessor instruction format

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The Motorola, Inc. patent solves the following problem:

When the data processors in the first frame forms, expansion instruction or register set is usually implemented by simply adding additional electronics in the central processing unit (CPU), although significant expansion may Cabinet needs more space and power supply capacity. With the advent of minicomputers, these enhancements more difficult to integrate into existing settings. An alternative to the expansion of the CPU is to provide additional circuitry in a special "hardware support" module. However, its implementation needed in many of the signal if the internal CPU to be carried out by the wiring harness to the module. Additionally, the CPU is often need new signals that coordinate the processing activities of the module. One form of this type of interface used in Digital Equipment Corporation in the couple PDP-11 FP-11C Floating Point processor.

Our analysis of this patent is as follows:

Motorola, Inc.’s patent US 4715013 A deals with Coprocessor instruction format.
A system for interfacing a processor to a coprocessor using the standard cycle bus. processor, upon encountering his instruction stream an instruction with a particular format Operation words, moving in a Command meeting to follow the words of the Operation of a particular Coprocessor appointed a coprocessor Identity field meeting in Operation. In examining the meaning of Command meeting, the Coprocessor respond to any of a set of primitives response indicating functions Coprocessor processor needs to do to support the Command with Coprocessor. interface provides for all functions that Coprocessor needed, including the selective vectoring to appropriate handlers outside.

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Brake actuator with automatic adjustment

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The Bendix France patent solves the following problem:

Our analysis of this patent is as follows:

Bendix France’s patent US 4712655 A deals with Brake actuator with automatic adjustment.
The invention relates to a brake actuator with automatic range change including a screw and nut actuating mechanism (32) the extension of the control of a joint system with a screw and nut to change pitch and a unidirectional clutch (42) that is responsive to the relative axial movement between a control piston (14) and a fixed body (10) in taking control piston (14). The brake actuator includes a device for controlling (62) the rotation of the nut (34) in the actuating mechanism (32) to allow rotation of the nut (34) beyond a predetermined value torque for rotating the latter.

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Anti-knocking in internal combustion engine

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The Nippondenso Co., Ltd. patent solves the following problem:

The present invention relates generally to an anti-knock control system, especially a system to recognize the knock-occuring conditions of an internal combustion engine and thus control the internal combustion machine to prevent the occurrence of knocking according to the result of detection in the case of top-occuring.

Our analysis of this patent is as follows:

Nippondenso Co., Ltd.’s patent US 4711212 A deals with Anti-knocking in internal combustion engine.
Expressed an anti-knock control system for controlling an internal combustion engine to prevent knocking according to a knocked condition notice a knocking detecting apparatus on the basis of a standard distribution of knocking magnitude values ​​derived from the output signal of a knock sensor. The knock detection device arranged to derive a peak magnitude value from the output signal of the top sensor generated within a predetermined engine rotational angle of a sal thus gain a number of top values the magnitude, determine a pattern in the distribution of many of the top magnitude principles on the basis of the results of comparisons between the frequency of the peak magnitude value exceeds an upper threshold value and the frequency of the top magnitude value go down to a lower threshold value, and noticed a knocking condition of the machine according to the determined distribution pattern. The lower threshold value is a value equivalent to a cumulative point lower than the cumulative 50% point on a cumulative distribution and upper threshold value is a value equivalent to one cumulative points higher than the cumulative 50% point on the cumulative distribution.

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Redundant optical recording of information in different formats

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The Drexler Technology Corporation patent solves the following problem:

Silverman et al. teaching in US Pat. No. 4,213,038 an access control system with an identification card. card with machine recordable indicia used in selecting a master microspot pattern from memory in the machine. This master pattern compared to a similar pattern to the card for authentication. The card is also space for a photograph and a signature. Similarly, Idelson et al. (US Pat. No. 4,151,667) teach an identification card with a photo, and a phosphorescent bar code pattern used for authentication. The amount of information that these cards can hold very limited. Random microspot guidelines only be used for verification, while bar code only represents a small amount of specific data.

Our analysis of this patent is as follows:

Drexler Technology Corporation’s patent US 4711996 A deals with Redundant optical recording of information in different formats.
Information recorded in situ in a wallet-sized card, throwing laser recordable material in the card, then the recording indicia, in situ, the material with a laser. At least some of the indicia of microscopic eyes read that information, along with the machine read information, read the information being redundant with at least some of the machine readable information. This visually read information recorded as the characters did in matrices nonconnected laser recorded spots. The characters may be letters, numbers and characters, or the like. The characters read with an optical magnifier. A laser beam and the light detector can be used to read digital information to scan the cards with the beam.

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Method and apparatus for object identification

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The Fuji Electric Company, Ltd. patent solves the following problem:

An example of a conventional object recognition apparatus of this kind is Autovision II manufactured Automatix Co. The facilities use the Stanford algorithm developed at Stanford University Laboratory. Stanford algorithm, various data about (area, length / width, peripheral length, gravity center, sloping, maximum length from the gravity center, average length of the gravity center , the number of holes, etc.) measured five to ten times. The results of these measurements are processed statistically to obtain the average values ​​or differences principles similar to those values. Object recognition is carried out according to the determined set of values. Such a device is disadvantageous, however, when one thing to recognize a remote blob or pattern. If a plurality of objects are in contact with one another or stacked on one another, although it is impossible to identify things or the wrong things considered.

Our analysis of this patent is as follows:

Fuji Electric Company, Ltd.’s patent US 4712248 A deals with Method and apparatus for object identification.
One way of things to identify and determine the facilities within the borders of a thing to be recognized that the point corresponding to the sudden change in the profile of things. Every part of the boundary between adjacent points is considered the oldest data elements and data in the distance on the map. These data associated with each of those gathered in the same kind of data associated with the border to discuss things and what is known as the references that have the highest chance to gather.

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