Low power differential signal transmission apparatus
A differential signal, transmission device technology, applied in the direction of logic circuit connection/interface layout, logic circuit coupling/interface using field effect transistors, electrical components, etc., can solve problems such as excess, and achieve high operating speed and low power. The effect of consumption
Inactive Publication Date: 2013-05-01
NOVATEK MICROELECTRONICS CORP
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However, although this method has the problem of improving the redundant space, it still has an extra current source. In order to solve this problem, the present invention provides a differential signal transmission device, which uses a switchable current source. Make the transistor switch also a current source
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[0118] The present invention mainly utilizes a switchable current source, allowing the transistor switch to be a current source at the same time, so as to achieve the advantages of low power consumption. Please refer to Figure 7 , is a schematic circuit diagram illustrating the low-power differential signal transmission device provided by the present invention. In this embodiment, the low power differential signal transmission device 70 includes a switching current device 71 and a differential signal generating device 72 , and the differential signal generating device 72 is coupled to the switching current device 71 .
[0119] The switching current device 71 is used for receiving input voltages VINP and VINN, and generating a plurality of reference currents I1, I2, I3 and I4 according to the input voltages VINP and VINN. The differential signal generating device 72 has a plurality of PMOS transistors T1 , T2 , T3 , T4 , a plurality of NMOS transistors T5 , T6 , T7 , T8 and o...
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The present invention discloses a low power differential signal transmission equipment which comprises switching electrical current device and differential signal generating device, wherein the differential signal generating device coupled to the switching electrical current device; the switching electrical current device receives the first input voltage and the second input voltage, and generates a plurality of reference electrical current according to the first input voltage and the second input voltage; the differential signal generating device is provided with a plurality of the first transistors, a plurality of the second transistors, the first output pressure end and the second output pressure end; conducting / closing status of the plurality of first transistors and the second transistors are controlled by a plurality of reference electrical current; the first output pressure end is used to output the first output pressure, the second output pressure end is used to output the second output pressure; the first output pressure and the second output pressure are determined by conducting / closing status of the plurality of transistors.
Description
technical field [0001] The present invention relates to a differential signal transmission device, and in particular to a low-power differential signal transmission device. Background technique [0002] In order to improve the sensitivity of electronic components and save power consumption, the use of differential input will enable the tiny amplitude to be amplified, and the information can be hidden in the amplitude by using the amplitude and transmitted as an information signal. Traditional differential signal transmitters can operate normally when the power supply voltage (VDD) is greater than 2.5V, but when the power supply voltage is less than 2V (for example, 1.8V is used in 0.18-μm process), due to the redundant space in the VDD direction (headroom ) is not enough to cause failure. This is due to the finite on-resistance of the PMOS transistor switch. The finite on-resistance causes cross-voltage across the transistors and consumes redundant space, so a higher power...
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IPC IPC(8): H03K17/687H03K19/0185H04L25/02
Inventor 陈健忠涂建成
Owner NOVATEK MICROELECTRONICS CORP