摘要:
A system and method for adjusting the phase of the analog signal produced by an analog modem connected to a digital modem over a telephone network. The digital portion of the telephone network is locked to the network clock, and the modems have no control over the sampling timing or rate as the analog signal is sampled and quantized by a codec. If the analog signal is shifted in phase relative to the network clock, then the codec may be sampling at unresolvable points on the analog signal, thereby causing errors and a decrease in the usable bandwidth for transmitting data. The analog modem symbol frequency is locked to the clock of the digital network using loop-back timing. A phase estimate is computed using the quantized samples of a known reference signal. Next, a “phase offset” is calculated by comparing the phase estimate to an optimum phase value. Then the digital modem sends the calculated phase offset information to the analog modem. The analog modem then delays its transmitted signal by the phase offset. After the phase of the analog modem's transmitter is adjusted, the analog signal reaches the codec at the phase desired by the digital modem.
摘要:
A crystal ball structure with changeable ball appearance having a base, a fixing base and a transparent box. A nose portion is used to combine the base and the fixing base to form an integral body that is separable from each other. An open end of the transparent box is connected with the rubber plug base. Accordingly, the base may be easily separated from the fixing base so that a card may also be inserted into or removed from the open end of the transparent box, thus the ball appearance is achieved.
摘要:
Accordingly, the object of the present invention is a decorative plate with dynamic phenomenon having a plate body and decorative card on the plate surface of the plate body, wherein a driven mechanism driven by a music box is provided by a plate body, and a vibrating rod and an auxiliary rod of the driven mechanism are installed on the external side of the plate surface, the ends of the vibrating rod and the auxiliary rod are pivotally connected with the positioning holes of the vibrating block; and the gap between the positioning holes is larger than that between the bases of the vibrating rod and the auxiliary rod; therefore, the decorative card on the plate surface is swung as a swing chair.
摘要:
A pistol lighter includes a hollow pistol casing having a barrel portion and a perforated butt portion, a gas cylinder disposed inside the barrel portion, a movable trigger to release gas from the gas cylinder, a spark generator having a biased push button abutting the trigger and an electrode to ignite the released gas from the gas cylinder, a plurality of light emitting diodes disposed at the barrel portion, a speaker fixed inside the hollow pistol casing adjacent to the butt portion, a control circuit similarly disposed inside the hollow casing to actuate the light emitting diodes and the speaker, and a contact switch to activate the control circuit. The trigger has a contact member to actuate the contact switch whenever the trigger is pulled.
摘要:
A word line driver circuit for providing a suppressed word line voltage includes a switch configured to selectively load a word line to a suppressed word line voltage node and a word line charging circuit coupled between a high power supply node and the suppressed word line voltage node. The word line charging circuit includes a first transistor device responsive to a control pulse for charging the suppressed word line voltage node to a suppressed word line voltage and a second transistor device for maintaining the suppressed word line voltage.
摘要:
A detachable cabinet with multiple functions is provided. The cabinet includes a folding frame, a top panel and a bottom panel. The folding frame is foldable to save transport costs. Also, the top panel and the bottom panel are connected to the folding frame the notch and the stud. Therefore, the bench cabinet can be assembled and disassembled easily without tools by users. After assembly, the cabinet would assemble divider panels or drawers to form as a floor cabinet, a drawer cabinet or a storage cabinet.
摘要:
Characters on an on-screen keypad are hidden once a cursor is placed over the keypad. This prevents any spyware from screen logging the key selection as the characters on the keypad are not visible at the moment a key is selected. The keys of the keypad are optionally color-coded to help a user remember the location of the key with the desired character once the cursor is over the keypad.
摘要:
System and method for generating a sense amplifier enable (“SAE”) signal having a programmable delay with a feedback loop to control the SAE signal duty cycle, which can be used in SRAM or DRAM, or other kinds of memory cells. An illustrative non-limiting embodiment comprises: a programmable clock chopper, a low pass filter, a bias generator, a comparator, and a feedback control module.
摘要:
A television table which can be assembled and disassembled without tools is provided. The television table unities a first connecting body and a second connecting body mounted between a tabletop and a pedestal. The first connecting body includes at least one fixing pillar extending therefrom. The second connecting body includes at least one slot. The slot has a proximal edge for allowing the head section to be inserted therethrough and a clamping edge for tight-fitting the fixing pillar. Also, a fixing pin passes through fixing holes of the tabletop and the two pedestals to avoid the tabletop sliding laterally respective to the pedestals and make a connection of the tabletop and the two pedestals firmly.
摘要:
A tabletop attachment system includes a first body and a second body mounted between a wooden tabletop and a wooden pedestal. The first body includes a first body member having a first side for mounting on the pedestal and a second side including at least one detent extending therefrom. The second body includes a second body member having a first side for mounting on the tabletop and a second side, and at least one slot extends therethrough. The slot has a proximal edge for allowing the second detent section to be inserted therethrough and a distal edge for tight-fitting the detent. The tabletop has a groove for allowing the second detent section to mutually contact with and tight-fit in an end of the groove.