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Differential-to-single-ended converter

A converter, single-ended technology, used in differential amplifiers, amplifiers, DC-coupled DC amplifiers, etc., can solve the problem of increasing the complexity of the winding and the number of integrated circuit pins

Active Publication Date: 2015-01-21
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the differential signal used in the differential mode requires at least two signal transmission lines, which will increase the complexity of the wiring and the pin count of the integrated circuit compared to one signal transmission line required by the single-ended signal.

Method used

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  • Differential-to-single-ended converter

Examples

Experimental program
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Embodiment Construction

[0024] figure 2 A differential-to-single-ended converter 20 according to an embodiment of the invention is shown. as figure 2 As shown, the differential-to-single-ended converter 20 has two NMOS transistors N11 and N12, and four PMOS transistors P11, P12, P21, and P22. In one embodiment, the element sizes of the NMOS transistors N11 and N12 are about the same; the element sizes of the PMOS transistors P11 and P12 are about the same; and the element sizes of the PMOS transistors P21 and P22 are about the same.

[0025] The NMOS transistors N11 and N12 are used as a differential pair, and their gate terminals are respectively driven by the non-inversion signal S-NON and the inversion signal S-INV of the differential signal. The sources of the NMOS transistors N11 and N12 are coupled to the power line VSS, while the drains of the NMOS transistors N11 and N12 are not coupled together. The operating states of the NMOS transistors N11 and N12 are complementary. In other words,...

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PUM

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Abstract

The invention provides a differential-to-single-ended converter and a relevant method. The differential-to-single-ended converter is used for converting a differential input signal into a single-ended output signal. The differential-to-single-ended converter comprises a first transistor, a second transistor, a third resister, a fourth resistor and a current source pair. The first transistor and the second transistor are driven by the differential input signal. The first transistor and the second resistor are provided with two first conduction ends and two second conduction ends, wherein the first conduction ends are coupled together, and the second transmission ends are not coupled together. The third transistor and the fourth transistor are driven by the differential input signal and connected together with the first transistor and the second transistor in series respectively. The current source pair is connected with the third transistor and the fourth transistor in series, provided with a common control end and coupled to the second conduction end of the first transistor. The second conduction end of the second transistor is used for producing the single-ended output signal.

Description

technical field [0001] Embodiments of the present invention generally relate to differential-to-single-ended converters, and more particularly to converters that convert a differential input signal into a single-ended output signal. Background technique [0002] In order to resist noise transmitted from power lines and semiconductor substrates, internal signals in integrated circuits can be processed in a differential mode. For example, a ring oscillator (ring oscillator) often uses a differential mode to generate a clock signal, which can avoid the influence of common mode noise on frequency. [0003] However, the differential signal used in the differential mode requires at least two signal transmission lines, which will increase the complexity of the wiring and the pin count of the integrated circuit compared to one signal transmission line required by the single-ended signal. Therefore, the signals of most logic circuits in the integrated circuit adopt single-end mode (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/45
CPCH03F3/45076
Inventor 陈信光
Owner MEDIATEK INC