CA2204045A1 - Frequency converter circuit - Google Patents
Frequency converter circuitInfo
- Publication number
- CA2204045A1 CA2204045A1 CA 2204045 CA2204045A CA2204045A1 CA 2204045 A1 CA2204045 A1 CA 2204045A1 CA 2204045 CA2204045 CA 2204045 CA 2204045 A CA2204045 A CA 2204045A CA 2204045 A1 CA2204045 A1 CA 2204045A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- frequency
- exclusive
- running average
- frequency converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Within a differential detection demodulator, a received signal is first quantized by a limiter amplifier and then subjected to frequency conversion by a frequency converter.
The frequency converter circuit converts a frequency of a first 2-level signal using a second 2-level signal having a frequency distinct from the frequency of that first signal, and includes: an exclusive OR element for obtaining a logical exclusive OR element of the first and second signal;
running average generator means, coupled to the exclusive OR
element, for generating a signal corresponding to k times a running average of an output of the exclusive OR element, k being a positive integer; and hard decision means, coupled to the running average generator means, for converting an output of that running average generator means to a 2-level logical signal. In response to the output of the frequency converter, a phase comparator outputs a relative phase signal representing the phase shift of the received signal after frequency conversion relative to the phase reference signal.
The frequency converter circuit converts a frequency of a first 2-level signal using a second 2-level signal having a frequency distinct from the frequency of that first signal, and includes: an exclusive OR element for obtaining a logical exclusive OR element of the first and second signal;
running average generator means, coupled to the exclusive OR
element, for generating a signal corresponding to k times a running average of an output of the exclusive OR element, k being a positive integer; and hard decision means, coupled to the running average generator means, for converting an output of that running average generator means to a 2-level logical signal. In response to the output of the frequency converter, a phase comparator outputs a relative phase signal representing the phase shift of the received signal after frequency conversion relative to the phase reference signal.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3347245A JP2837982B2 (en) | 1991-12-27 | 1991-12-27 | Delay detection demodulator |
| JP3-347245 | 1991-12-27 | ||
| JP4053583A JP2932820B2 (en) | 1992-03-12 | 1992-03-12 | Phase detection circuit, delay detection demodulation device, and phase detection method |
| JP4-053583 | 1992-03-12 | ||
| JP4-067124 | 1992-03-25 | ||
| JP6712492A JPH05276061A (en) | 1992-03-25 | 1992-03-25 | Frequency conversion circuit |
| CA002086279A CA2086279C (en) | 1991-12-27 | 1992-12-24 | A differential detection demodulator |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002086279A Division CA2086279C (en) | 1991-12-27 | 1992-12-24 | A differential detection demodulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2204045A1 true CA2204045A1 (en) | 1993-06-28 |
| CA2204045C CA2204045C (en) | 2000-09-26 |
Family
ID=29424562
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002204046A Expired - Fee Related CA2204046C (en) | 1991-12-27 | 1992-12-24 | Differential detection demodulator and phase comparator therefor |
| CA002204045A Expired - Fee Related CA2204045C (en) | 1991-12-27 | 1992-12-24 | Frequency converter circuit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002204046A Expired - Fee Related CA2204046C (en) | 1991-12-27 | 1992-12-24 | Differential detection demodulator and phase comparator therefor |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2204046C (en) |
-
1992
- 1992-12-24 CA CA002204046A patent/CA2204046C/en not_active Expired - Fee Related
- 1992-12-24 CA CA002204045A patent/CA2204045C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2204046A1 (en) | 1994-06-25 |
| CA2204045C (en) | 2000-09-26 |
| CA2204046C (en) | 2000-09-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |