# US 2010/0166127 A1 · Apparatuses for transmitting and receiving data

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- Number: US 2010/0166127 A1
- Document ID: US20100166127A1
- Status: Published application
- Kind: A1
- Application number: 12/643,682
- Filed: 2009-12-21
- Published: 2010-07-01
- Earliest claimed: 2008-12-30
- Inventors: Byung-Tak Jang
- Web page: https://patentgrep.com/patent/US20100166127A1

## CPC

- H04L 7/0008: {Synchronisation information channels, e.g. clock distribution lines}
- H04L 25/0272: {Arrangements for coupling to multiple lines, e.g. for differential transmission}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

An apparatus for transmitting data comprises a clock signal generator generating clock signals; and a transmitter generating transmitting signals having same sized and shaped differential signals, i.e., the clock signals and data signals, subsequent to a strobe signal having common components different from those of the data signals. Accordingly, even though the distortion occurs in the strobe signal during transmission, the clock signal and the data signal can easily be recovered within a give action margin, and timing skew error variation between the clock signal and the data signal can be minimized by noise occurring in the transmission path, whereby the data signal can be transmitted at a higher frequency. Since the clock signal is recovered using the strobe signal, an area occupied by a circuit built in the apparatus for receiving data and used for recovery of the clock signal can be reduced.

## Claims

### Claim 1

An apparatus comprising:
a clock signal generator for generating clock signals having a magnitude and duration; and
a transmitter for transmitting differential clock and data signals, the clock and data signals having similar magnitudes and durations, subsequent to a strobe signal having common components different from common components of the data signals.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein one of the data signals is arranged prior to the strobe signal.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the common components of the strobe signal are greater than the common components of the data signals.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the common components of the strobe signal are smaller than the common components of the data signals.

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein the strobe signal has differential components different from differential components of the clock signals and the data signals.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein the strobe signal includes a strobe tail between the strobe signal and the clock signals.

### Claim 7 (depends on 1)

The apparatus of claim 1, wherein the transmitter repeats the strobe signal in succession, without intervening clock and data signals.

### Claim 8 (depends on 7)

The apparatus of claim 7, wherein the repeated strobe signals have differential components with the same magnitude.

### Claim 9 (depends on 7)

The apparatus of claim 7, wherein the repeated strobe signals have differential components with different magnitudes.

### Claim 10 (depends on 1)

The apparatus of claim 1, wherein the data signals include at least one of image data and a control signal.

### Claim 11 (depends on 1)

The apparatus of claim 1, wherein the transmitter stops transmitting for a time period required for a receiver to recover the clock signals.

### Claim 12

An apparatus, comprising:
a strobe signal extractor receiving transmitted clock signals and data signals having similar magnitudes and durations, subsequent to a strobe signal having common components different from those of the data signals, and extracting the strobe signal from the received signals;
a clock recovery unit recovering the clock signals from the received signals using the extracted strobe signal; and
a sampler sampling the data signals included in the transmitted signals, in response to the recovered clock signals.

### Claim 13 (depends on 12)

The apparatus of claim 12, wherein the strobe signal extractor determines whether the common components of the received signals have been varied, using a reference signal, and extracts the strobe signal from the transmitted signals using the determined result.

### Claim 14 (depends on 13)

The apparatus of claim 13, further comprising a reference signal generator accumulating a size of differential components of repeatedly received transmitting signals and outputting an average value of the accumulated values as the reference signal.

### Claim 15 (depends on 13)

The apparatus of claim 13, wherein the reference signal is previously selected as an optimized value.

### Claim 16 (depends on 13)

The apparatus of claim 13, wherein the reference signal is transmitted together with the transmitted signals.

### Claim 17 (depends on 13)

The apparatus of claim 13, wherein the reference signal is an average value of common components of the transmitted signals.

### Claim 18 (depends on 13)

The apparatus of claim 13, wherein it is determined whether the common components of the transmitted signals have been varied, using a resultant value obtained by one of increasing and decreasing a value of the reference signal at a given rate.

### Claim 19 (depends on 12)

The apparatus of claim 12, wherein the clock recovery unit includes a clock signal detector for detecting at least one of a front edge and a rear edge of the clock signal input subsequent to the strobe signal.

### Claim 20 (depends on 19)

The apparatus of claim 19, wherein the clock recovery unit further includes a delay-locked loop for generating the recovered clock signal using the detected edge.

### Claim 21 (depends on 19)

The apparatus of claim 19, wherein the clock recovery unit further includes a phase-locked loop using the detected edge.

### Claim 22

Apparatuses for transmitting and receiving data, comprising:
a timing controller for transmitting differential clock signals and data signals having similar magnitudes and durations, subsequent to a strobe signal having common components different from common components of the data signals; and
a source driver for receiving the clock, data, and strobe signals, extracting the strobe signals from the received signals, recovering the clock signals using the extracted strobe signal, and sampling the data signals included in the received signals, using the recovered clock signals.