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Line level is the specified strength of an audio signal used to transmit analog sound between audio components such as CD and DVD players, television sets, audio amplifiers, and mixing consoles. Line level sits between other levels of audio signals. There are weaker signals such as those from microphones (Mic Level/Microphone Level) and instrument pickups (Instrument Level), and stronger signals, such as those used to drive headphones and loudspeakers (Speaker Level). The "strength" of these various signals does not necessarily refer to the output voltage of the source device; it also depends on its output impedance and output power capability.
Bistable weak PUF circuit with autonomous stability screening function
A bistable weak PUF circuit with an autonomous stability screening function is provided. The bistable weak PUF circuit includes a decoder, a timing circuit, and a PUF core circuit is provided. The PUF core circuit realizes stable bit screening by connecting two screening levels. When the two screening levels connected to the PUF core circuit are equal, the PUF core circuit generates a W-bit original PUF response in one clock cycle under the control of an m-bit word line level signal output thereto by the decoder. Then, the m-bit word line level signal received by the PUF core circuit is kept unchanged, one of the two screening levels connected to the PUF core circuit is kept unchanged, and the other is reduced by a certain amplitude, and two W-bit screened PUF responses are obtained after the screening levels are exchanged.
Owner:WENZHOU UNIV