# Digital quadrature phase detection

## Abstract

A system for detecting the phase of a frequency of phase modulated signal that includes digital quadrature sampling of the frequency or phase modulated signal at two times that are one quarter of a cycle of a reference signal apart, determination of the arctangent of the ratio of a first sampling of the frequency or phase modulated signal to the second sampling of the frequency or phase modulated signal, and a determination of quadrant in which the phase determination is increased by 2.pi. when the quadrant changes from the first quadrant to the fourth quadrant and decreased by 2.pi. when the quadrant changes from the fourth quadrant to the first quadrant whereby the absolute phase of the frequency or phase modulated signal can be determined using an arbitrary reference convention.

- Inventors:

- (Idaho Falls, ID)

- Publication Date:

- Research Org.:
- EG & G IDAHO INC

- OSTI Identifier:
- 868317

- Patent Number(s):
- US 5117440

- Assignee:
- United States of America as represented by United States (Washington, DC) INEEL

- DOE Contract Number:
- AC07-76ID01570

- Resource Type:
- Patent

- Country of Publication:
- United States

- Language:
- English

- Subject:
- digital; quadrature; phase; detection; detecting; frequency; modulated; signal; sampling; times; quarter; cycle; reference; apart; determination; arctangent; ratio; quadrant; increased; changes; fourth; decreased; whereby; absolute; determined; arbitrary; convention; phase modulated; quadrature phase; modulated signal; reference signal; phase modulate; digital quadrature; /375/329/359/

### Citation Formats

```
Smith, James A., and Johnson, John A.
```*Digital quadrature phase detection*. United States: N. p., 1992.
Web.

```
Smith, James A., & Johnson, John A.
```*Digital quadrature phase detection*. United States.

```
Smith, James A., and Johnson, John A. Wed .
"Digital quadrature phase detection". United States. https://www.osti.gov/servlets/purl/868317.
```

```
@article{osti_868317,
```

title = {Digital quadrature phase detection},

author = {Smith, James A. and Johnson, John A.},

abstractNote = {A system for detecting the phase of a frequency of phase modulated signal that includes digital quadrature sampling of the frequency or phase modulated signal at two times that are one quarter of a cycle of a reference signal apart, determination of the arctangent of the ratio of a first sampling of the frequency or phase modulated signal to the second sampling of the frequency or phase modulated signal, and a determination of quadrant in which the phase determination is increased by 2.pi. when the quadrant changes from the first quadrant to the fourth quadrant and decreased by 2.pi. when the quadrant changes from the fourth quadrant to the first quadrant whereby the absolute phase of the frequency or phase modulated signal can be determined using an arbitrary reference convention.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {1992},

month = {1}

}