摘要:
Disclosed is a ghost cancellation system based on an enhanced ghost cancellation reference signal for noisy environments. The received analog television signal is first subjected to a digitization step for processing in the digital domain. A wavelet de-noising operation is applied on the reference signal to remove undesired noises before a communication channel is estimated, and filter coefficients are optimally determined. The digitized composite signals are then ghost-reduced by IIR and FIR filters. The power consumption and training time of the realized chip are decreased, which is ideal for mobile and platform applications.
摘要:
A circuit breaker has a first and a second conducting strip respectively mounted in a lower end of a shell; a first terminal mounted on an upper end of the second conducting strip; a bimetal strip longitudinally mounted on an upper end of the first conducting strip; a second terminal detachably in contact with the first terminal; a button mounted on an upper end of the shell; and an arm pivotally mounted in an interior of the shell. An upper end of the bimetal strip is securely connected to a lower end of the arm. When the current is excessively high, the distortion of the bimetal strip in turn drives the arm and the button. The switch angle of the button is much bigger via the leg so that the switch angle of the button is obvious.
摘要:
A circuit overload protective device includes a body having a button pivotally disposed thereto and a bimetallic strip disposed thereto which has a first contact point disengagably contacting a second contact point on the body. A first member and a second member are respectively connected to an underside of the button, wherein the first member has a leg extending therefrom so as to be shifted into a curved recess defined in a first inner side of the body when the bimetallic strip is deformed, and the second member has a distal end thereof connected to the first contact point. A third member is disposed to a second inner side of the body and a spring is biasedly connected between the first member and the third member.
摘要:
A safety switch has a casing, a first prong, a second prong, the rocker and a pivot switch contact unit. The rocker is mounted pivotally on the top of the casing and has an arm and an end opposite to the arm. The pivot switch contact unit has a switch contact and a pull rod. The switch contact bends upward as temperature of the switch contact increases, is pivoted to the top end of the first prong and has a proximal and distal ends. The distal end of the switch contact is connected to the arm and selectively abuts the second prong. The pull rod is connected between the end of the rocker and the proximal end of the switch contact to provides the second end of the rocker a down pulling force when the distal end of the switch contact is slightly bent and not abut the second prong.
摘要:
A safety switch has a housing, a conducting assembly, a switching assembly and a resilient member. The housing has an on-end and an off-end. The conducting assembly is mounted in the housing and has two conductors and a bimetal strip. The conductors respectively correspond to the on and off-ends and are attached respectively to two separated ends of a circuit. The bimetal strip selectively connects the conductors. The switching assembly has a rocker and a connecting arm. The rocker is mounted pivotally on a top of the housing. The connecting arm connects the rocker and a contacting end of the bimetal strip. The resilient member is mounted between the on-end of the housing and the rocker to stably position the rocker when the circuit is on or off.
摘要:
A safety switch has a housing, multiple legs and a cover. The housing is hollow and has a space, an opening, multiple gaps, a bottom and a front. The space is defined in the housing. The opening is defined in the front. The gaps are respectively defined through the bottom. The legs are respectively mounted in the gaps and each has a vertical edge. The cover is mounted on the opening of the housing and has the inner surface. The inner surface tightly abuts and holds the vertical edge of the legs to hold securely the legs in the gaps. Therefore, the safety switch has a low cost and is compact.
摘要:
A bimetallic strip for a circuit breaker includes a substantially rectangular frame with two long sides, two short sides, a top side, and a bottom side. The long sides are slightly bent upwards. The first short side is securely mounted on the first terminal of the circuit breaker and has a length smaller than that of the second short side. A first saddle-like slot is defined at the first short side. A movable node mounted at the second short side and the bottom side. By means of changing the depth of the saddle-like slot, it is very easy for a manufacturer to make the metallic strips with various specifications of current ratings.
摘要:
A circuit breaker includes a body with a chamber defined therein. A button is pivotally mounted at an upper side of the chamber. Two terminals are provided in the chamber and extend out of from a bottom of the body. The first terminal has a first node formed at an upper end thereof. The second terminal has a bimetallic strip extending above the first terminal, and a second node is formed at a distal end of the bimetallic strip and electrically connected with the first node in a switched-on status. A key is provided in the body and between the terminals and beneath the bimetallic strip. The key has a lug formed on an upper surface of the key and abuts the bimetallic strip in the normal status. When the circuit breaker experiences an excessively high consumption of electricity by devices connected thereto, the bimetallic strip can be deformed to terminate the circuit.
摘要:
A circuit breaker includes a shell with a hollow button at the top. The button has an indicator light received therein and a central tab extending downward. A first blade, a second blade and a grounding prong extend out of the shell through the bottom of the shell. A curved metal piece is housed in the shell and electrically and pivotally connected to an inner end of the second blade. A helical spring is mounted around the tab and compressed between the hollow button and the curved metal piece, and additionally a resistor is held in the shell and electrically connected to the grounding prong. The indicator light has a first terminal electrically connected with the helical spring and a second terminal selectively engaged with the resistor.
摘要:
An electrical breaker includes a casing with a pushbutton pivotally connected to the top thereof, an alloy plate extending from one of two inside walls of the casing and connected to a first prong extending from the casing, a push member and an L-shaped member pivotally connected to the first end of the pushbutton, a biasing member biasing the push member to let the protrusion of the push member press against the other inside wall which has a recess defined therein. The distal end of the alloy plate is pushed by the push member to contact the second prong when the first end of the pushbutton is pushed, and the distal end of the alloy plate is disengaged from the second prong by the horizontal portion of the L-shaped member when an overload current passes through the alloy plate which curves to push the first end of the pushbutton upwardly.