High-speed square wave generating device and method

• Main Authors: HU ZHICHEN, YANG LIJIE, WU FUCUN, ZHAO YANBO, YUAN ZHENHUA
• Format: Patent
• Language: Chinese; English
• Published: 11.05.2011
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; PULSE TECHNIQUE

The invention discloses a high-speed square wave generating device and method. The device comprises a sine wave generating module, a comparing module and a mapping adjusting module. The method comprises the following steps: generating the sine waveform data of the required square wave frequency by a direct digital synthesis (DDS) method, filtering and conditioning the signals to obtain sine signals; comparing the sine signal level with zero level, wherein when the sine signal level is greater than the zero level, the output level value is +Vs, and when the sine signal level is less than the zero level, the output level value is 0, thereby acquiring pulse signals with same frequency as the sine signals; and comparing the pulse signal level with a clamping level +Vs/2, wherein when the pulse signal level is greater than the clamping level, the output level value is VH, and when the pulse signal level is less than the clamping level, the output level value is VL, thereby acquiring squaresignals with same frequen