Popcorn noise op amp

Burst noise, or popcorn noise was an issue when the first operational amplifiers were introduced. It made a noise like cooking popcorn if sent to a loudspeaker - hence the name. The most common cause for this noise in ICs is believed to be the random trapping and release of charge carriers at thin film interfaces.

1. How do you reduce the noise of popcorn?
2. What is burst noise in electronics?
3. What is RTS noise?
4. What is a U1 op amp?

How do you reduce the noise of popcorn?

Reduction of popcorn noise by a few simple modifications in the manufacturing process is reported in this paper. Annealing in an HC1 atmosphere to getter metal impurities and slow pulling after emitter deposition to diminish stress-induced junction defects appear to reduce the popcorn noise significantly.

What is burst noise in electronics?

Burst noise is a type of electronic noise that occurs in semiconductors and ultra-thin gate oxide films. It is also called random telegraph noise (RTN), popcorn noise, impulse noise, bi-stable noise, or random telegraph signal (RTS) noise.

What is RTS noise?

Random Telegraph Signal (RTS) noise is characterized by discrete transitions in the signal current of a MOSFET device. First observed in point contact diodes, the steady shrinking of pixel pitch has driven RTS noise to become a major noise source in modern CMOS image sensors.

What is a U1 op amp?

Op amp U1 forces the two regulators to share the load current when the outputs are shorted together by the CPU metalization. The load current is sensed by the two low value current sense resistors R12 and R13. These resistors are actually implemented as short traces on the PC board.