| 释义 |
flip-flop
flip-flop (flĭp′flŏp′)n.1. The movement or sound of repeated flapping.2. A reversal, as of a stand or position: a foreign policy flip-flop.3. A backless, often foam rubber sandal held to the foot at the big toe by means of a thong.4. A backward somersault or handspring.5. An electronic circuit or mechanical device capable of assuming either of two stable states, especially a computer circuit used to store a single bit of information.v. flip-flopped, flip-flop·ping, flip-flops v.intr.1. To move back and forth between two conditions or circumstances, sometimes repeatedly: "The weather has flip-flopped between sweltering heat and violent storms" (New York Times).2. To reverse a stand or position: "With the board having flip-flopped over zoning issues in the last several years, residents are looking to this fall's election for clarity" (Eugene L. Meyer).3. To execute a backward somersault or handspring.v.tr. To move from one position to the reverse or opposite: The coach flip-flopped the linemen.
flip′-flop′per n.flip-flop n 1. (Gymnastics) a backward handspring 2. (Electronics) Also called: bistable an electronic device or circuit that can assume either of two stable states by the application of a suitable pulse 3. informal chiefly US a complete change of opinion, policy, etc 4. a repeated flapping or banging noise 5. (Clothing & Fashion) Also called (US, Canadian, Austral, and NZ): thong a rubber-soled sandal attached to the foot by a thong between the big toe and the next toe vb (intr) , -flops, -flopping or -flopped6. informal chiefly US to make a complete change of opinion, policy, etc7. to move with repeated flaps adv with repeated flappings: to go flip-flop. [C16: reduplication of flip]flip′-flop`
n., v. -flopped, -flop•ping. n. 1. a sudden or unexpected reversal, as of opinion or policy. 2. a backward somersault. 3. Also called flip′-flop` cir`cuit. an electronic circuit having two stable conditions, each one corresponding to one of two alternative input signals. 4. the sound or motion of something flapping. 5. a flat backless shoe or slipper, esp. one of rubber with a thong between the first two toes. v.i. 6. to perform a flip-flop. Also, flip′-flap` (for defs. 2, 5, 9, 12), flip′flop` (for def. 6, 7).[1655–65]flip-flop
Past participle: flip-flopped
Gerund: flip-flopping
| Imperative |
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| flip-flop | | flip-flop |
| Present |
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| I flip-flop | | you flip-flop | | he/she/it flip-flops | | we flip-flop | | you flip-flop | | they flip-flop |
| Preterite |
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| I flip-flopped | | you flip-flopped | | he/she/it flip-flopped | | we flip-flopped | | you flip-flopped | | they flip-flopped |
| Present Continuous |
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| I am flip-flopping | | you are flip-flopping | | he/she/it is flip-flopping | | we are flip-flopping | | you are flip-flopping | | they are flip-flopping |
| Present Perfect |
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| I have flip-flopped | | you have flip-flopped | | he/she/it has flip-flopped | | we have flip-flopped | | you have flip-flopped | | they have flip-flopped |
| Past Continuous |
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| I was flip-flopping | | you were flip-flopping | | he/she/it was flip-flopping | | we were flip-flopping | | you were flip-flopping | | they were flip-flopping |
| Past Perfect |
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| I had flip-flopped | | you had flip-flopped | | he/she/it had flip-flopped | | we had flip-flopped | | you had flip-flopped | | they had flip-flopped |
| Future |
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| I will flip-flop | | you will flip-flop | | he/she/it will flip-flop | | we will flip-flop | | you will flip-flop | | they will flip-flop |
| Future Perfect |
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| I will have flip-flopped | | you will have flip-flopped | | he/she/it will have flip-flopped | | we will have flip-flopped | | you will have flip-flopped | | they will have flip-flopped |
| Future Continuous |
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| I will be flip-flopping | | you will be flip-flopping | | he/she/it will be flip-flopping | | we will be flip-flopping | | you will be flip-flopping | | they will be flip-flopping |
| Present Perfect Continuous |
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| I have been flip-flopping | | you have been flip-flopping | | he/she/it has been flip-flopping | | we have been flip-flopping | | you have been flip-flopping | | they have been flip-flopping |
| Future Perfect Continuous |
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| I will have been flip-flopping | | you will have been flip-flopping | | he/she/it will have been flip-flopping | | we will have been flip-flopping | | you will have been flip-flopping | | they will have been flip-flopping |
| Past Perfect Continuous |
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| I had been flip-flopping | | you had been flip-flopping | | he/she/it had been flip-flopping | | we had been flip-flopping | | you had been flip-flopping | | they had been flip-flopping |
| Conditional |
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| I would flip-flop | | you would flip-flop | | he/she/it would flip-flop | | we would flip-flop | | you would flip-flop | | they would flip-flop |
| Past Conditional |
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| I would have flip-flopped | | you would have flip-flopped | | he/she/it would have flip-flopped | | we would have flip-flopped | | you would have flip-flopped | | they would have flip-flopped |
Thesaurus| Noun | 1. | flip-flop - a decision to reverse an earlier decisionchange of mind, turnabout, turnaround, reversaldeciding, decision making - the cognitive process of reaching a decision; "a good executive must be good at decision making"afterthought, rethink, second thought, reconsideration - thinking again about a choice previously made; "he had second thoughts about his purchase" | | 2. |  flip-flop - a backless sandal held to the foot by a thong between the big toe and the second toethongsandal - a shoe consisting of a sole fastened by straps to the foot | | 3. | flip-flop - an electronic circuit that can assume either of two stable statescircuit, electric circuit, electrical circuit - an electrical device that provides a path for electrical current to flow | | 4. |  flip-flop - a backward somersault flip, somersault, somersaulting, summersault, summerset, somerset - an acrobatic feat in which the feet roll over the head (either forward or backward) and return | | Verb | 1. |  flip-flop - reverse (a direction, attitude, or course of action)alternate, interchange, tack, switch, flipchange by reversal, reverse, turn - change to the contrary; "The trend was reversed"; "the tides turned against him"; "public opinion turned when it was revealed that the president had an affair with a White House intern" |
Translationsflip-flop
flip-flop1. To completely change one's opinion or stance. Primarily heard in US. The voters were tired of hearing the candidate flip-flop and felt they could not trust him to stick with one position. I used to hold a staunch view about the case, but then I flip-flopped after hearing the other side's testimony.2. noun A complete change in opinion or stance. There have been several flip-flops among the candidates during the campaign, with some changing their stance more than once!3. noun A thong sandal. Often used in the plural to refer to the pair. Don't forget your flip-flops when we go to the beach, or you'll have to walk on the hot sand barefoot!flip-flop1. n. a reversal. The president denied making a flip-flop. He said he simply forgot his earlier position. 2. n. the return trip of a long journey. (see also flip side.) Didn’t we chat on the flip-flop last week? 3. in. to change direction or intensity. Jed flip-flopped twice in the evening, leaving us where we started. 4. in. to waver in one’s decisions. Well, you just flip-flop all you want. I know what I want. flip-flop
flip-flop1. Gymnastics a backward handspring 2. Electronics an electronic device or circuit that can assume either of two stable states by the application of a suitable pulse Flip-Flop a trigger circuit (seeFLIP-FLOP CIRCUIT) that can remain for an arbitrary length of time in one of two (or, less frequently, of more than two) stable states and can be abruptly switched from one state to the other by the application of an input signal. A flip-flop has two outputs: a main output and an inverse output. Specific output signals of differing levels correspond to each flip-flop state. In one state a high-level signal is formed at the main output, and a low-level signal is formed at the inverse output. In the other state the high-level and low-level signals are formed at the inverse and main outputs, respectively. A flip-flop is characterized by the following important parameters: the speed, the response time, and the levels of the input and output signals. The speed is defined as the maximum possible number of switching operations per unit time. The response time is defined as the time required for the flip-flop to go from one state to the other; this time characterizes the time lag between the output signal and the input signal. The level of the input signal is understood to be the minimum signal value required to switch the flip-flop. The level of the output signal in most flip-flops is not lower than the level of the input signal; this situation makes it possible to connect flip-flops in series without intermediate amplification. The most widely used types of flip-flops are electronic devices that incorporate such components as electron tubes, gas discharge devices, semiconductor diodes, various types of transistors, and, especially, integrated microcircuits. Flip-flops based on magnetic elements, pneumatic or hydraulic control devices, and other elements are also sometimes used. According to the nature of the input signals, flip-flops with potential inputs (direct and inverse) and with dynamic inputs (also direct and inverse) are distinguished. Flip-flops with potential inputs respond to a high-level signal at the direct input and a low-level signal at the inverse input. Flip-flops with dynamic inputs respond to differences between input signals, that is, to variations in signal levels. Such flip-flops respond to a positive difference at the direct input and to a negative difference at the inverse input. A description of the most frequently used types of flip-flops follows. Flip-flops with a counting input (T flip-flops) change their state with each input signal. Flip-flops with two conditioning inputs (R-S flip-flops) change their state only when a control signal is applied to a specific input (the R or the S input); in this scheme the repeated action of a signal at the same input does not change the state of the flip-flop. Universal flip-flops (JK flip-flops) combine the properties of the T flip-flop and the R-S flip-flop. In delay flip-flops (D flip-flops) the state and the output signal corresponding to that state duplicate the input signal. In addition to flip-flops of these types there are also combination flip-flops, which are universal multifunction devices with large numbers of inputs. The flip-flops described above are called symmetrical; asymmetrical flip-flops, or Schmitt triggers, are also used. An asymmetrical flip-flop goes from one state to the other when the input signal reaches a level called the response threshold and returns to the original state when the input signal decreases to a certain level. There are also multistable flip-flops, which have more than two stable states. Flip-flops of various types are used in digital computers and in automation. With the use of flip-flops, one can construct such devices as digital automatic machines with program control for discrete data processing (for example, counters, scalers, registers of various kinds, decoders, and adders), pulse shapers, and digital frequency dividers. In digital automation flip-flops function as elementary automatic devices with a memory and two states corresponding to the two possible values of the binary logic variable (x = 0 and x = 1). Such flip-flops are classified as asynchronous or synchronous. Synchronous, or clocked, flip-flops operate only when periodic clock signals, usually of the meander type, that synchronize the operation of the flip-flop are applied to the inputs. Synchronous flip-flops are subdivided into single-cycle and double-cycle types. The latter type is a system consisting of two flip-flops that execute the same logic operation, but with a time shift equal to the duration of half a cycle of the input clock signal. This duplication of flip-flop operation is required for time division of the reception of the data conveyed by the input signals and for transmission of data from the flip-flop outputs to other components of the device or to its input. REFERENCESItskhoki, la. S., and N. I. Ovchinnikov. Impul’snye i tsifrovye ustroistva. Moscow, 1972.
Starostin, A. N. Impul’snaia tekhnika. Moscow, 1973.
Kagan, B. M., and M. M. Kanevskii. Tsifrovye vychislitel’nye mashiny i sistemy. Moscow, 1973.IU. B. BARABANOV, I. A. DANIL’CHENKO, and E. I. PETROVICHEV flip-flop (hardware)A digital logic circuit that can be in one of twostates which it switches (or "toggles") between undercontrol of its inputs. It can thus be considered as a one bitmemory. Three types of flip-flop are common: the SR flip-flop, the JK flip-flop and the D-type flip-flop (orlatch).
Early literature refers to the "Eccles-Jordan circuit" and the"Eccles-Jordan binary counter", using two vacuum tubes asthe active (amplifying) elements for each bit of informationstorage. Later implementations using bipolar transistorscould operate at up to 20 million state transitions per secondas early as 1963.flip-flopAn electronic circuit that maintains its 0 or 1 state and is used in static memories and hardware registers. By the mid-20th century, the flip-flop was a breakthrough in circuit logic, which allowed data to be stored. The first flip-flops, known as "trigger circuits," were constructed with two transistors. Subsequent designs use two NOR or NAND logic gates.AcronymsSeefoliosflip-flop
Related to flip-flop: D Flip-FlopSynonyms for flip-flopnoun a decision to reverse an earlier decisionSynonyms- change of mind
- turnabout
- turnaround
- reversal
Related Words- deciding
- decision making
- afterthought
- rethink
- second thought
- reconsideration
noun a backless sandal held to the foot by a thong between the big toe and the second toeSynonymsRelated Wordsnoun an electronic circuit that can assume either of two stable statesRelated Words- circuit
- electric circuit
- electrical circuit
noun a backward somersaultRelated Words- flip
- somersault
- somersaulting
- summersault
- summerset
- somerset
verb reverse (a direction, attitude, or course of action)Synonyms- alternate
- interchange
- tack
- switch
- flip
Related Words- change by reversal
- reverse
- turn
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