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Noise generator

A noise and noise source technology, applied in the field of noise generators, can solve the problems of amplifying noise, low breakdown voltage, not fully suitable for digital CMOS technology, etc., to achieve the effect of increasing the noise/interference ratio and increasing the noise level

Inactive Publication Date: 2011-05-18
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Likewise, no protection is provided for noise generators from interference
[0008] The disadvantage of the above solution is that in the process of generating thermal noise as a seed for generating random bit sequences, where the above method is not fully suitable for digital CMOS technology
Resistor values ​​must be high, which means that, if implemented on an integrated circuit, these resistors occupy a large area, leading to increased substrate and other capacitively coupled interference tendencies
Also, not all CMOS technologies offer suitable resistors
Reverse-biased PN junctions used as noise sources often rely on carrier multiplication to amplify the noise, which results in high noise levels, which are noisy at wide noise bandwidths
Unfortunately, no suitable junction with a sufficiently low breakdown voltage is available in standard digital ASIC technology

Method used

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Embodiment Construction

[0033] figure 1 An electronic device embodied as a mobile telephone 1 is shown, in which the invention is employed. However, the present invention is not limited to the mobile phone 1 but can be implemented in any electronic device using a noise source. The mobile telephone 1 includes various circuits for communicating with other electronic devices, eg over a mobile telecommunications network. The electronic device may also be implemented as a mobile radio terminal, a pager, a communicator such as an electronic organizer or a smart phone, among others. In order to provide secure communication, the mobile phone 1 includes a cryptographic block which can be used for encryption and decryption respectively. Thus, the mobile telephone 1 is adapted to provide cryptographic functions known per se. According to one embodiment of the invention, the means for generating the noise signal are provided as an integrated circuit together with other functional blocks, such as cryptographic...

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Abstract

A device for generating a noise signal, which may be used for generating a truly random sequence (10) of bits is disclosed. The device comprises a noise source (11), and an amplifier (12) connected to the noise source (11). The device according noise source according to the invention is protected from interfering signals to provide high noise-interference ratio. Further, the present invention relates to an integrated circuit and an electronic apparatus comprising the device for generating a noise signal according to the invention.

Description

[0001] The application of the present invention is a divisional application of the application dated March 19, 2004, the application number is 200480013923.5, and the invention name is "noise generator". technical field [0002] The present invention relates to a device for generating a random sequence or seed of random bits. More specifically, the present invention relates to a noise source that prevents jamming by jamming signals so as to provide a true random seed that can be used to generate random bits. Background technique [0003] The random numbers or bits are usually of the pseudo-random (PN) type, generated by a feedback shift register. This PN sequence is deterministic and cyclic, but when snapshotted at random time intervals, it appears random over a sufficiently long period. By seeding the PN generator with truly random values, the PN code will have better statistical properties. Such a seed can be generated, for example, from thermal noise (which is in princi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B29/00H03F3/45H03K3/84
CPCH03B29/00H03F3/4565H03F3/45188H03K3/84
Inventor S·马蒂森
Owner TELEFON AB LM ERICSSON (PUBL)