If predictable operation is desired, negative feedback is used, by applying a portion of the output voltage to the inverting input.

If the input voltages change in the same direction, the negative feedback makes Q3 / Q4 base voltage follow ( with 2V < sub > BE </ sub > below ) the input voltage variations.

If the base current to the transistor is assumed to be zero, the negative feedback forces the transistor to increase its collector-emitter voltage up to 1 V until its base-emitter voltage reaches 0. 625 V ( a typical value for a BJT in the active region ).

For example, in a negative feedback loop, the transcription factor acts as its own repressor: If the transcription factor protein binds the DNA of its own gene, it will down-regulate the production of more of itself.

If one worker receives positive feedback from the boss while the other employee feels like they deserved that, positive feedback jealousy can arise.

If the gain is large, but slightly less than 1, then high-pitched slowly decaying feedback tones will be created, but only with some input sound.

If not designed correctly, amplifiers with negative feedback can become unstable, resulting in unwanted behavior such as oscillation.

If A < sub > OL </ sub > >> 1, then A < sub > fb </ sub > ≈ 1 / β and the effective amplification ( or closed-loop gain ) A < sub > fb </ sub > is set by the feedback constant β, and hence set by the feedback network, usually a simple reproducible network, thus making linearizing and stabilizing the amplification characteristics straightforward.

If Pica is motivated by sensory feedback, an alternative method of feeling that sensation should be provided.

If a system has overall a high degree of negative feedback, then the system will tend to be stable.

If a PA system's microphone picks up sounds from its own loudspeakers, and these sounds are re-amplified enough, the effect of this feedback can be loud squealing or howling noises from the loudspeakers.

If the loop gain AB is positive, then a condition of positive or regenerative feedback exists.

If the loop gain ( the product of the amplifier gain and the extent of the positive feedback ) at any frequency is greater than one, then the amplifier will oscillate at that frequency ( Barkhausen stability criterion ).

If a microphone picks up the amplified sound output of loudspeakers in the same circuit, then howling and screeching sounds of audio feedback ( at up to the maximum power capacity of the amplifier ) will be heard, as random noise is re-amplified by positive feedback and filtered by the characteristics of the audio system and the room.

If feedback comments ( positive or negative ) and criticism are treated as if they are exactly the same thing, usually something is being hidden, suppressed or denied.

If accepted, the feedback will be published in a scrolling list of comments in reverse chronological order, with the most recent submission at the top of the page.

If fully activated, this control will ultimately produce a continuous feedback loop of pure noise.

From a NY Times article about the same topic “... On another forum, Digital Point, a poster wrote, “ I will pay for positive feedback on TripAdvisor .” A Craigslist post proposed this: “ If you have an active Yelp account and would like to make very easy money please respond .”( 1 )( 2 ) There are tens-of-thousands of ads out there all over the internet of people requesting you to write bogus reviews for their business and people offering to do the same.

If the strength of a synapse is only reinforced by stimulation or weakened by its lack, a positive feedback loop will develop, causing some cells never to fire and some to fire too much.

If synapses were only reinforced by positive feedback, they would eventually come to the point of complete inactivity or too much activity.

If you include the driver in the system, then he does provide a feedback path by observing the direction of travel and compensating for errors by turning the steering wheel.

If the traffic on a virtual circuit is exceeding its traffic contract, as determined by the GCRA, the network can either drop the cells or mark the Cell Loss Priority ( CLP ) bit ( to identify a cell as potentially redundant ).

If the client remains connected to a network for which this IP is valid, the server may grant the request.

If the operator already has this in place, which is often the case today, the network can be upgraded to EDGE by activating an optional software feature.

If the network actually is a small-world network, Freenet should find data reasonably quickly ; ideally on the order of hops.

If the network is one-dimensional, and the chain of nodes is connected to form a circular loop, the resulting topology is known as a ring.

If this dough is leavened with yeast, fermentation produces carbon dioxide bubbles, which, trapped by the gluten network, cause the dough to rise.

If IPv6 stateless address autoconfiguration is unsuitable for an application, a network may use stateful configuration with the Dynamic Host Configuration Protocol version 6 ( DHCPv6 ) or hosts may be configured statically.

If some existing technology or company whose benefits are largely based on network effects starts to lose market share against a challenger such as a disruptive technology or open standards based competition, the benefits of network effects will reduce for the incumbent, and increase for the challenger.

If there was a net gain, one could in theory use a number of control nodes for which many hosts on the Internet form a distributed computing network completely unawares.

If one peer on the network fails to function properly, the whole network is not compromised or damaged.

If the number of participants is large, and some of their physical or network distancee are great, then the probability of complete success ( which is, in ideal circumstances, required for system security ) will be rather low.

If the organization that is serving the content has control over the network between server and recipients ( i. e., educational, government, and corporate intranets ), then routing protocols such as Protocol Independent Multicast can be used to deliver stream content to multiple Local Area Network segments.

If a network has a firewall and operates both MS Windows and Unix-like systems, both protocols must be enabled inbound through the firewall.

If error correction facilities are needed at the network interface level, an application may use the Transmission Control Protocol ( TCP ) or Stream Control Transmission Protocol ( SCTP ) which are designed for this purpose.

If the network interface is a plug-in card rather than being integrated into the motherboard, the card may need to be connected to the motherboard by an additional cable.

If the attack is conducted on a sufficiently large scale, entire geographical regions of Internet connectivity can be compromised without the attacker's knowledge or intent by incorrectly configured or flimsy network infrastructure equipment.

If all else fails, it should issue an INT 18h BIOS interrupt call ( followed by an INT 19h just in case INT 18h would return ) in order to give back control to the BIOS, which would then attempt to boot off other devices, attempt a remote boot via network or invoke ROM BASIC.

If a mapping is available, presentation service data units are encapsulated into session protocol data units, and passed down the stack. This layer provides independence from data representation ( e. g., encryption ) by translating between application and network formats.

If the network cable is terminated on both ends and when without termination data transfer stop and when cable breaks, the entire network will be down.

:: If the repeaters in a network that is based upon the physical extended star topology are replaced with hubs or switches, then a hybrid network topology is created that is referred to as a physical hierarchical star topology, although some texts make no distinction between the two topologies.