Pulse count generator for wide range digital phase detector
AssigneeRockwell International Corporation
InventorDonald E. Phillips
Life of this patent
Estimating the term…
Abstract
A wide range digital phase detector employs a pulse count generator which provides mutually exclusive counting pulses corresponding to the pulses in the two pulse trains to be compared, thereby ensuring that all pulses including those which are coincident are properly registered and accounted for.
Claims14
A pulse count generator for providing mutually exclusive counting pulses corresponding to the pulses contained in two pulse trains, comprising:
- pulse generator means having two inputs and two outputs, each output being associated with a different one of said inputs for providing a bilevel signal, the first level occurring in the absence of an actuating signal at its associated input and the second level occurring in the presence of an actuating signal, arranged so that an output signal is enabled to change to a second level only in the presence of a first level signal at the other output;
- first storage means for receiving one of the pulse trains connected to one of said inputs for generating and applying thereto an actuating signal for each pulse contained in that pulse train and also connected to the pulse generator means output associated with said connected input for terminating each actuating signal in response to the second level signal generated therefrom;
- and
- second storage means for receiving the other pulse train connected to the other one of said inputs for generating and applying thereto an actuating signal for each pulse contained in that pulse train and also connected to the pulse generator means output associated with said connected other input for terminating each actuating signal in response to the second level signal generated therefrom.
In combination with a digital/analog converter and an up/down digital counter whose output is connected to the converter input, a pulse count generator for providing mutually exclusive counting pulses corresponding to the pulses contained in two pulse trains, comprising:
- pulse generator means having two inputs and two outputs, each output being associated with a different one of said inputs for providing a bilevel signal, the first level occurring in the absence of an actuating signal at its associated input and the second level occurring in the presence of an actuating signal, arranged so that an output signal is enabled to change to a second level only in the presence of a first level signal at the other output;
- first storage means for receiving one of the pulse trains connected to one of said inputs for generating and applying thereto an actuating signal for each pulse contained in that pulse train and also connected to the pulse generator means output associated with said connected input for terminating each actuating signal in response to the second level signal generated therefrom, and
- second storage means for receiving the other pulse train connected to the other one of said inputs for generating and applying thereto an actuating signal for each pulse contained in that pulse train and also connected to the pulse generator means output associated with said connected other input for terminating each actuating signal in response to the second level signal generated therefrom.
A wide range phase detector employing a pulse count generator which provides mutually exclusive counting pulses corresponding to the pulses contained in the two pulse trains to be compared, comprising:
- pulse generator means having two inputs and two outputs, each output being associated with a different one of said inputs for providing a bilevel signal, the first level occurring in the absence of an actuating signal at its associated input and the second level occurring in the presence of an actuating signal, arranged so that an output signal is enabled to change to a second level only in the presence of a first level signal at the other output;
- first storage means for receiving one of the pulse trains connected to one of said inputs for generating and applying thereto an actuating signal for each pulse contained in that pulse train and also connected to the pulse generator means output associated with said connected input for terminating each actuating signal in response to the second level signal generated therefrom;
- second storage means for receiving the other pulse train connected to the other one of said inputs for generating and applying thereto an actuating signal for each pulse contained in that pulse train and also connected to the pulse generator means output associated with said connected other input for terminating each actuating signal in response to the second level signal generated therefrom;
- an up/down digital counter for receiving the respective outputs of said pulse generator means, and
- a digital/analog converter whose input is connected to the output of said digital counter.
Dependencies are inferred from the claim text.