WO2005088837A1 - Pulsgenerator-schaltkreis und schaltkreis-anordnung - Google Patents
Pulsgenerator-schaltkreis und schaltkreis-anordnung Download PDFInfo
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- WO2005088837A1 WO2005088837A1 PCT/DE2005/000263 DE2005000263W WO2005088837A1 WO 2005088837 A1 WO2005088837 A1 WO 2005088837A1 DE 2005000263 W DE2005000263 W DE 2005000263W WO 2005088837 A1 WO2005088837 A1 WO 2005088837A1
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- effect transistor
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
- H03K3/356—Bistable circuits
- H03K3/356104—Bistable circuits using complementary field-effect transistors
- H03K3/356113—Bistable circuits using complementary field-effect transistors using additional transistors in the input circuit
- H03K3/356121—Bistable circuits using complementary field-effect transistors using additional transistors in the input circuit with synchronous operation
Definitions
- the invention relates to a pulse generator circuit and a circuit arrangement.
- Edge-controlled flip-flops or edge-controlled master-slave latch pairs are essential basic components for the synchronization of multi-stage logic circuits. They are used in almost all modern integrated digital circuits such as digital signal processors (DSPs), microprocessors and integrated circuits for communication applications to increase data transmission through pipelining. For the application area with low active DSPs, digital signal processors (DSPs), microprocessors and integrated circuits for communication applications to increase data transmission through pipelining. For the application area with low active
- Miller effect appear twice as large, because in the dynamic range both the gate and the drain potentials change in opposite directions on a time scale of approximately 10ps to 30ps.
- Edge-controlled flip-flops based on sense amplifiers in contrast to other circuit Arrangements such as edge-controlled master-slave latch pairs have a high switching speed even with low gate overdrive V DD -V, see [1].
- a circuit arrangement 100 as disclosed in [4] is described below with reference to FIG.
- the circuit arrangement 100 is formed from a pulse generator subcircuit 101, a flip-flop subcircuit 102 and a switching subcircuit 103.
- the pulse generator subcircuit 101 has one
- Clock signal input 104 provided a clock signal CLK.
- the clock signal input 104 is coupled to the gate terminal of an n-MOS clock field-effect transistor 105.
- a first source / drain connection of the n-MOS clock field-effect transistor 105 is brought to the electrical ground potential V SS 115.
- a second source / drain connection of the n-MOS clock field-effect transistor 105 is coupled to a first source / drain connection of a first n-MOS logic field-effect transistor 106, to the gate connection of which a data signal D is applied.
- the second source / drain connection of the n-MOS clock field-effect transistor 105 is also connected to a first source / drain connection of a second n-MOS logic Field effect transistor 107 coupled, at the gate terminal of which a data signal / D complementary to the data signal D is applied.
- a second source / drain connection of the first n-MOS logic field-effect transistor 106 is connected to a first source / drain connection of an n-MOS bypass.
- Field effect transistor 108 coupled, the gate terminal of which is brought to an electrical potential V DD .
- a second source / drain connection of the n-MOS bypass field effect transistor 108 is connected to a second source / drain connection of the second n-MOS logic
- Field effect transistor 107 coupled. Furthermore, a second source / drain connection of the first n-MOS logic field-effect transistor 106 is coupled to a first source / drain connection of a first n-MOS signal transfer field-effect transistor 109.
- a second source / drain connection of the first n-MOS signal transfer field-effect transistor 109 is with a first source / drain connection of a first p-MOS clock field-effect transistor 111 and with a first source / drain connection of a first p-MOS feedback field effect transistor 112 coupled.
- a second source / drain connection of the first p-MOS clock field-effect transistor 111 and a second source / drain connection of the first p-MOS feedback field-effect transistor 112 are brought to the electrical potential of the supply voltage V DD 116. Furthermore, the gate connection of the first n-MOS signal transfer field-effect transistor 109 is coupled to the gate connection of the first p-MOS feedback field-effect transistor 112.
- the second source / drain connection of the second n-MOS logic field-effect transistor 107 is coupled to a first source / drain connection of a second n-MOS signal transfer field-effect transistor 110, the second source / drain connection of which is connected to a first source / drain connection of a second p-MOS clock field-effect transistor 113 and with a first source / drain connection of a second p-MOS
- Feedback field effect transistor 114 is coupled.
- the gate connection of the second n-MOS signal transfer Field effect transistor 110 is coupled to the gate terminal of the second p-MOS feedback field effect transistor 114.
- a second source / drain connection of the second p-MOS clock field-effect transistor 113 and a second source / drain connection of the second p-MOS feedback field-effect transistor 114 are brought to the electrical potential of the supply voltage V DD 116.
- the gate connection of the first p-MOS clock field-effect transistor 111 is coupled to the clock signal input 104.
- the clock signal input 104 is coupled to the gate connection of the second p-MOS clock field-effect transistor 113.
- a first source / drain terminal of a first p-MOS flip-flop field-effect transistor 125 is on that
- a first source / drain of a second p-MOS flip-flop field effect transistor 127 is on the electrical
- n-MOS flip-flop field-effect transistor 127 is coupled to a first source / drain connection of a second n-MOS flip-flop field-effect transistor 128, the second source / drain connection of which is brought to the electrical ground potential 115.
- the gate connection of the first p-MOS flip-flop field effect transistor 125 and the gate connection of the first n-MOS flip-flop field effect transistor 126 are coupled to one another and form a storage node / Q of the flip-flop subcircuit 102.
- the gate terminal of the second p-MOS flip-flop field effect transistor 127 and the Gate connection of the second n-MOS flip-flop field-effect transistor 128 coupled to one another and form a storage node Q of the flip-flop subcircuit 102.
- the second source / drain connection of the first p-MOS flip-flop field-effect transistor 125 is coupled to the gate terminal of the second p-MOS flip-flop field effect transistor 127. Furthermore, a second source / drain connection of the second p-MOS flip-flop field-effect transistor 127 is coupled to the gate connection of the first n-MOS flip-flop field-effect transistor 126.
- a first source / drain connection of a first p-MOS switching field-effect transistor 117 is brought to the supply potential 116.
- a second source / drain connection of the first p-MOS switching field-effect transistor 117 is coupled to a first source / drain connection of a first n-MOS switching field-effect transistor 118, the second source / drain connection of which electrical ground potential 115 is brought.
- a first source / drain connection of a second p-MOS switching field-effect transistor 119 is brought to the electrical supply potential 116.
- a second source / drain connection of the second p-MOS switching field-effect transistor 119 is coupled to a first source / drain connection of a second n-MOS switching field-effect transistor 120, the second source / drain connection of which electrical ground potential 115 is brought.
- a first source / drain connection of a third p-MOS switching field-effect transistor 121 is brought to the electrical supply potential 116.
- a second source / drain connection of the third p-MOS switching field-effect transistor 121 is coupled to a first source / drain connection of a third n-MOS switching field-effect transistor 122, the second source / drain connection of which electrical Ground potential 115 is brought.
- the gate connection of the third p-MOS switching field-effect transistor 121, the gate connection of the third n-MOS switching field-effect transistor 122 and the gate connection of the second p-MOS switching field-effect transistor 119 are coupled to one another.
- a first source / drain connection of a fourth p-MOS switching field-effect transistor 123 is brought to the supply potential 116.
- a second source / drain connection of the fourth p-MOS switching field-effect transistor 123 is coupled to a first source / drain connection of a fourth n-MOS switching field-effect transistor 124, the second source / drain connection of which electrical ground potential 115 is brought.
- the gate connection of the fourth p-MOS switching field-effect transistor 123, the gate connection of the fourth n-MOS switching field-effect transistor 124 and the gate connection of the first p-MOS switching field-effect transistor 117 are coupled to one another.
- the gate connection of the second p-MOS feedback field-effect transistor 114 is coupled to the gate connection of the first p-MOS switching field-effect transistor 117. Furthermore, the gate connection of the first p-MOS feedback field-effect transistor 112 is coupled to the gate connection of the second p-MOS switching field-effect transistor 119.
- the second source / drain terminal of the third p-MOS switching field-effect transistor 121 is coupled to the gate terminal of the first n-MOS switching field-effect transistor 118.
- the second source / drain connection of the fourth p-MOS switching field-effect transistor 123 is coupled to the gate connection of the second n-MOS switching field-effect transistor 120.
- the second source / drain connection of the first p-MOS switching field-effect transistor 117 is coupled to the gate connection of the second p-MOS flip-flop field-effect transistor 127. Furthermore, the second source / drain connection of the second p- MOS switching field-effect transistor 119 is coupled to the second source / drain terminal of the second p-MOS flip-flop field-effect transistor 127.
- Field-effect transistor 114 provides an input signal / S for flip-flop sub-circuit 102, generated by pulse generator sub-circuit 101. Furthermore, an input signal / R of the flip-flop is at the gate terminal of first p-MOS feedback 1 field-effect transistor 112 Subcircuit 102 provided, generated by the pulse generator subcircuit 101.
- circuit arrangement 100 which represents an edge-controlled flip-flop based on sense amplifiers, is described below.
- the edge-controlled flip-flop in FIG. 1 is a circuit arrangement 100 which has the pulse generator circuit 101, formed from the transistors 105 to 114.
- the pulse generator circuit 101 formed from the transistors 105 to 114.
- the internal inputs S, / S, R, / R of a set reset flip-flop formed from the transistors of the flip-flop subcircuit 102 and the switching subcircuit 103 are set.
- the output signals / S and / R of the pulse generator subcircuit 101 are precharged to the electrical supply potential V DD 116 via the p-MOS transistors 111, 113 during a precharging phase (ie CLK to a logic value "0").
- either the channel region of the first n-MOS logic field-effect transistor 106 or of the second n-MOS logic field-effect transistor 107 is conductive, so that directly after the rising clock edge of CLK (ie after the transition from CLK from a logical value "0" to a logical value "1") either / S or / R is pulled down to the electrical potential V SS 115.
- This functionality is based on the disclosure of [5] on differential flip-flops via a differential sense amplifier.
- the n-MOS bypass field effect transistor 108 is of minimal dimensions and, after the rising clock edge, produces an electrical coupling from a source / drain connection of the first n-MOS signal transfer field effect transistor 109 and from a source / drain connection of the second n-MOS signal transfer field-effect transistor 110 to the electrical ground potential V SS 115 and ensures static operation. In this way, the state of the pulse generator subcircuit 101 is stable after the rising clock edge.
- [7] and [8] describe further flip-flop circuits with a clock field-effect transistor and a logic field-effect transistor.
- the invention is based in particular on the problem of providing a pulse generator circuit and a circuit arrangement with a higher switching speed.
- the problem is solved by a pulse generator circuit and by a circuit arrangement with the features according to the independent claims.
- a pulse generator circuit for generating an input signal for a flip-flop circuit from a clock signal and from a data signal which contains a clock field-effect transistor, to the gate connection of which the clock signal can be applied, and to the first source / Drain connection, the input signal for a flip-flop circuit can be provided.
- the data signal can be applied to the gate connection of a logic field effect transistor, and the first source / drain connection of the logic field effect transistor is coupled to the second source / drain connection of the clock field effect transistor.
- a feedback field effect transistor is provided, to the gate connection of which a feedback signal based on the clock signal can be applied, the first source / drain connection of which is coupled to the second source / drain connection of the logic field effect transistor, and the second of which A first electrical reference potential can be applied to the source / drain connection.
- the pulse generator circuit further contains a drive unit for driving the clock field-effect transistor, the logic field-effect transistor and the feedback field-effect transistor in such a way that to generate the input signal the clock field-effect transistor in time after the logic field-effect transistor and the feedback field-effect transistor for generating the flip -Flop signal is driven.
- a basic idea of the invention is to be seen in the fact that in a pulse generator circuit for generating an input signal for a flip-flop circuit from a clock signal and from a data signal, a cascade of clock field-effect transistor, logic field-effect transistor and feedback field-effect transistor in contrast to the Modified prior art is interconnected such that an increased signal processing speed is achieved when a signal passes through the three transistors.
- This speed increase is based on the fact that in order to generate the input signal, the clock field effect transistor arranged last in the cascade or at the very rear (that is, at whose connection the input signal is generated) is only triggered when the logic field effect transistor and the feedback field-effect transistor has already been driven or switched to generate the flip-flop signal.
- the three transistors of the pulse generator circuit of an edge-controlled flip-flop arrangement based on sense amplifiers are rearranged in comparison with the prior art in such a way that the last arriving clock signal CLK is the rearmost clock field effect transistor of the triple series arrangement controls from feedback field effect transistor, logic field effect transistor and clock field effect transistor.
- the signal / S or / R is generated on the drain side of the clock field-effect transistor as an input signal for the flip-flop circuit.
- An increase in the clock load (which is based on the sum of all clock transistor widths) is avoided according to the invention since the transistor widths of the transistors in the series arrangement can be reduced in comparison with the prior art. In this way there is a reduction in the delay time between the provision of data signal D.
- a fundamental principle of the invention is the rearrangement of the transistors of the pulse generator circuit (clock field effect transistor, logic field effect transistor and feedback field effect transistor) in the light of increased values of parasitic capacitances in sub-100 nm CMOS technologies.
- Another important aspect of the invention consists in advantageously using the dependence of the propagation time of signals in a transistor cascade on the arrangement of a transistor within such a series connection.
- the delay time of a CMOS logic circuit as a series arrangement of transistors depends on which input signal changes its state and when. For example, it can be observed that when a CMOS NAND gate (n-MOS transistors in series) is switched off, the shortest delay time occurs when the n-MOS transistor of the series arrangement which is at the rear in the signal flow direction (that is to say the transistor , the drain connection of which is coupled to the output) is switched on last. This observation can probably be attributed to the fact that the parasitic capacitances of the series arrangement have already been discharged via the series transistors that were previously switched on.
- V DS V DD -V SS is already present when the rear transistor is switched on.
- the latter causes a maximum transistor current at the beginning of the switching process.
- the percentage differences between the slowest and the fastest switching process, for example in a NAND gate with four inputs, are up to 20%.
- Circuit topology for such flip-flops is the pull-down path consisting of at least three n-MOS transistors (transistors 105, 106 and 109 in FIG. 1). In the input stage of such a circuit arrangement with a flip-flop, the dependency described above
- the clock signal CLK is the last signal to arrive.
- the resulting signal delay is avoided in that the clock field effect transistor, the feedback field effect transistor and the logic field effect transistor are rearranged according to the invention and are controlled in an improved manner, as a result of which the propagation times of the flip-flop are reduced.
- an additional clock field-effect transistor can be provided, to the gate connection of which the clock signal can be applied, to whose first source / drain connection a second electrical reference potential can be applied, and whose second source / drain Connection is coupled to the first source / drain of the clock field-effect transistor.
- an additional feedback field effect transistor can be provided, the gate connection of which is coupled to the gate connection of the feedback field effect transistor, the second source / drain connection of which can be applied to the first source / drain connection, and the second source / drain of which -Connection is coupled to the first source / drain connection of the clock field effect transistor.
- the pulse generator circuit can have a bypass field-effect transistor, the gate connection of which is coupled to the flip-flop circuit, the first source / drain connection of which the first electrical reference potential can be applied, and the second source / drain -Connection is coupled to the second source / drain connection of the clock field-effect transistor.
- the pulse generator circuit can have a bypass field effect transistor, the gate connection of which is coupled to the flip-flop circuit, the first source / drain connection of which is connected to the first source / drain connection
- Feedback field-effect transistor is coupled, and its second source / drain connection is coupled to the second source / drain connection of the clock field-effect transistor.
- none of the source / drain connections of the bypass transistor is brought to an electrical reference potential (for example an electrical ground potential), but rather with the source / drain connections of the feedback field-effect transistor or
- the first electrical reference potential can be an electrical ground potential and / or the second electrical An electrical supply potential can be the reference potential.
- the clock field effect transistor, the logic field effect transistor and the feedback field effect transistor can be field effect transistors of the n-conduction type.
- the additional clock field-effect transistor and the additional feedback field-effect transistor can be field-effect transistors of the p-line type.
- the bypass field effect transistor can be an n-line type field effect transistor.
- a second signal path which is circuit-identical to the first signal path formed from the field effect transistors, is provided from additional field effect transistors, which additional field effect transistors for generating a complementary input signal to the input signal of the flip-flop circuit from the clock signal and from one complementary data signal complementary to the data signal are interconnected.
- the pulse generator circuit is designed as a differential pulse generator circuit, in which a complementary signal is clearly provided for each signal.
- an identical or mirror-like transistor is clearly provided and connected to each transistor of the first signal path, in particular an additional clock field effect transistor corresponding to the clock field effect transistor, an additional logic field effect transistor corresponding to the logic field effect transistor and an feedback field effect transistor corresponding additional feedback field effect transistor, etc.
- the first source / drain connection of the additional clock field effect transistor of the second signal path can preferably be coupled to the gate connection of the additional feedback field effect transistor of the first data path.
- the first source / drain connection of the clock field effect transistor of the first signal path can be coupled to the gate connection of the additional additional feedback field effect transistor of the second data path.
- control unit can be set up in such a way that it applies the data signal to the gate connection of the logic field-effect transistor before the clock signal for converting the clock field-effect transistor from a state with an electrically non-conductive channel region to a state with an electrically conductive channel region is switched.
- a particularly favorable sequence of signal application to the transistors of the cascade of feedback field effect transistor / logic field effect transistor / clock field effect transistor is created, and thus particularly rapid signal processing for generating an input signal for the switching subcircuit or the flip-flop subcircuit.
- the circuit arrangement according to the invention which has a pulse generator circuit according to the invention, is described in more detail below. Refinements of the pulse generator circuit also apply to the circuit arrangement having a pulse generator circuit.
- the flip-flop circuit of the circuit arrangement can have memory field effect transistors for storing memory signals based on the input signal and / or the complementary input signal. Two of these memory field effect transistors can be used
- Field effect transistors of different line types each be connected to an inverter, so that the flip-flop circuit is essentially formed from two inverters.
- the flip-flop circuit can have field effect transistors connected between the memory field effect transistors and the pulse generator circuit.
- a first switching field-effect transistor can be provided, the gate connection of which is coupled to the first source / drain connection of the clock field-effect transistor, the second source / drain connection of which the second electrical reference potential can be applied, and the second source of which - / Drain connection is coupled to a storage node of the memory field effect transistors.
- a second switching field effect transistor can be provided, the gate connection of which is coupled to the gate connection of the complementary bypass field effect transistor, the first source / drain connection of which the first electrical reference potential can be applied, and the second source / Drain connection is coupled to the second source / drain connection of the first switching field-effect transistor.
- a protective field effect transistor can be provided, the gate connection of which is coupled to the gate connection of the first switching field effect transistor, the first source / drain connection of which is connected to the second source / drain connection of the first switching field effect transistor and with a source / drain connection of a storage
- Field effect transistor is coupled, and its second source / drain terminal is coupled to a source / drain terminal of another memory field effect transistor.
- a cross current is generated between memory field effect transistors and switching Field effect transistors avoided, whereby the functionality of the circuit arrangement is improved in terms of speed and dynamic power loss.
- circuit arrangement can be one of the
- Field effect transistors of the flip-flop circuit formed third signal path circuit-like fourth signal path from additional field effect transistors, which are connected additional field effect transistors of the flip-flop circuit for storing a complementary memory signal complementary to the memory signal.
- FIG. 1 shows a circuit arrangement according to the prior art
- FIG. 2 shows a circuit arrangement according to a first exemplary embodiment of the invention
- FIG. 3 shows a diagram which illustrates the operation of the circuit arrangement from FIG. 2,
- Figure 4 shows a circuit arrangement according to a second embodiment of the invention.
- Figure 5 shows a circuit arrangement according to a third embodiment of the invention.
- circuit arrangement 200 according to a first exemplary embodiment of the invention is described below with reference to FIG.
- the circuit arrangement 200 is formed from a pulse generator subcircuit 201, a flip-flop subcircuit 202 and a switching subcircuit 203.
- the flip-flop subcircuit 202 and the switching subcircuit 203 can also be referred to collectively as a flip-flop circuit.
- a clock signal CLK is provided at a clock signal input 204.
- the clock signal input 204 is coupled to the gate connection of a first n-MOS clock field-effect transistor 205 and a second n-MOS clock field-effect transistor 206.
- a first source / drain connection of a first n-MOS feedback field-effect transistor 209 is at the electrical ground potential 217.
- a second source / drain connection of the first n-MOS feedback field-effect transistor 209 is connected to a first source /
- the drain connection of a first n-MOS logic field effect transistor 207 is coupled, to the gate connection of which a data signal D can be applied.
- a second source / drain terminal of the first n-MOS logic field-effect transistor 207 is coupled to a first source / drain terminal of the first n-MOS clock field-effect transistor 205, the second source / drain terminal of which is connected to a first source / drain connection of a first p-MOS clock field-effect transistor 213 and is coupled to a first source / drain connection of a first p-MOS feedback field-effect transistor 215.
- the gate connection of the first p-MOS feedback field-effect transistor 215 is coupled to the gate connection of the first n-MOS feedback field-effect transistor 209.
- a first source / drain connection of a second n-MOS feedback field-effect transistor 210 is brought to the electrical ground potential 217.
- a second source / drain connection of the second n-MOS feedback field-effect transistor 210 is coupled to a first source / drain connection of a second n-MOS logic field-effect transistor 208, at the gate connection of which a data signal D complementary data signal / D can be applied.
- a second source / drain terminal of the second n-MOS logic field-effect transistor 208 is coupled to a first source / drain terminal of the second n-MOS clock field-effect transistor 206, the second source / drain terminal of which is connected to a first source / drain connection of a second p-MOS clock field-effect transistor 214 and is coupled to a first source / drain connection of a second p-MOS feedback field-effect transistor 216.
- the gate connection of the second p-MOS clock field-effect transistor 214 is coupled to the clock signal input 204. Furthermore, the gate connection of the second p-MOS feedback field-effect transistor 216 is coupled to the gate connection of the second n-MOS feedback field-effect transistor 210.
- the second source / drain terminal of the first n-MOS logic field-effect transistor 207 is coupled to a first source / drain terminal of a first n-MOS bypass field-effect transistor 211, the second source / drain terminal of which electrical ground potential 217 is brought.
- the first The source / drain connection of the second n-MOS clock field effect transistor 206 is coupled to a first source / drain connection of a second n-MOS bypass field effect transistor 212, the second source / drain connection of which is connected to the electrical ground potential 217 is brought.
- a first source / drain connection of a first p-MOS switching field-effect transistor 219 is brought to the electrical supply potential 218.
- a second source / drain connection of the first p-MOS switching field-effect transistor 219 is coupled to a first source / drain connection of a first n-MOS switching field-effect transistor 220, the second source / drain connection of which electrical ground potential 217 is brought.
- the gate connection of the first p-MOS switching field-effect transistor 219 is coupled to the gate connection of a third p-MOS switching field-effect transistor 223, the first source of which
- a second source / drain connection of the third p-MOS switching field-effect transistor 223 is coupled to a first source / drain connection of a third n-MOS switching field-effect transistor 224, the second source / drain connection of which electrical ground potential 217 is brought. Furthermore, the gate connection of the third n-MOS switching field-effect transistor 224 is coupled to the gate connection of the first p-MOS switching field-effect transistor 219.
- a first source / drain connection of a second p-MOS switching field-effect transistor 221 is on that
- a second source / drain connection of the second p-MOS switching field-effect transistor 221 is coupled to a first source / drain connection of a second n-MOS switching field-effect transistor 222, the second source / drain connection of which electrical Ground potential 217 is brought. Furthermore, the gate connection of the second p-MOS switching field-effect transistor 221 is coupled to the gate connection of a fourth p-MOS switching field-effect transistor 225 and to the gate connection of a fourth n-MOS switching field-effect transistor 227. The gate connection of the second n-MOS switching field-effect transistor 222 is coupled to the second source / drain connection of the third p-MOS switching field-effect transistor 223. A first source / drain connection of the fourth p-MOS switching field-effect transistor 225 is at the supply potential
- a second source / drain of the fourth p-MOS switching field-effect transistor 225 is coupled to a first source / drain of the fourth n-MOS switching field-effect transistor 226, whose second source / drain Connection is brought to the electrical ground potential 217. Furthermore, the second source / drain connection of the fourth p-MOS switching field-effect transistor 225 is coupled to the gate connection of the first n-MOS switching field-effect transistor 220.
- a first source / drain terminal of a first p-MOS flip-flop field effect transistor 227 is on that
- a second source / drain connection of the first p-MOS flip-flop field-effect transistor 227 is coupled to a first source / drain connection of a first n-MOS flip-flop field-effect transistor 228, the second source / drain Drain connection is brought to the electrical ground potential.
- a first source / drain connection of a second p-MOS flip-flop field-effect transistor 229 is brought to the electrical supply potential 218, whereas a second source / drain connection of the second p-MOS flip-flop field-effect transistor 229 is included a first source / drain connection of a second n-MOS flip-flop field-effect transistor 230 is coupled, the second source / drain connection of which is brought to the electrical ground potential 230.
- the gate connection of the first p-MOS flip-flop field effect transistor 227 and the gate connection of the first n-MOS flip-flop field effect transistor 228 are coupled to one another and form an inverse storage node / Q of the partial flip-flop circuit 202. Furthermore, the gate connection of the second p-MOS flip-flop field-effect transistor 229 and the gate connection of the second n-MOS flip-flop field-effect transistor 230 are coupled to one another and form a storage node Q of the flip-flop subcircuit 202.
- the gate connection of the first p-MOS flip-flop field effect transistor 227 is coupled to the first source / drain connection of the second n-MOS flip-flop field effect transistor 230. Furthermore, the gate connection of the second p-MOS flip-flop field effect transistor 229 is coupled to the second source / drain connection of the first p-MOS flip-flop field effect transistor 227.
- the gate terminal of the second p-MOS feedback field-effect transistor 216 is coupled to the gate terminal of the third p-MOS switching field-effect transistor 223.
- the gate connection of the first p-MOS feedback field-effect transistor 215 is coupled to the gate connection of the fourth p-MOS switching field-effect transistor 225.
- the second source / drain connection of the first p-MOS switching field-effect transistor 219 is coupled to the gate connection of the second p-MOS flip-flop field-effect transistor 229. Furthermore, the second source / drain terminal of the second p-MOS flip-flop field-effect transistor 229 is coupled to the second source / drain terminal of the second p-MOS switching field-effect transistor 221.
- the functionality of the circuit arrangement 200 is described below.
- the circuit arrangement 200 differs from the circuit arrangement 100 according to the prior art primarily with regard to the modifications described below.
- the respective output signals / S and / R of the pulse generator input stage 201, which form input signals of the flip-flop circuit 202, 203, are present at the drain contacts of the first and second n-MOS clock field-effect transistors 205, 206.
- the source contacts of the clock field effect transistors 205, 206 are coupled to the drain contacts of the first and second n-MOS logic field effect transistors 207, 208 (also referred to as data input transistors).
- the first and second n-MOS clock field-effect transistors 205, 206 are closed.
- the two n-MOS transistors 209, 210, which together with the first and second p-MOS feedback field-effect transistors 215, 216 form an amplifying feedback, are switched on.
- the charges on the internal nodes that is to say the parasitic capacitances of the pull-down paths, are still present at the start of the evaluation. Furthermore, the drain potentials of the data input transistors 106, 107 of the
- the clock transistor 105 has the drain-source voltage V DD -V T. As a result, the switching current through the respective pull-down path is lower.
- the diagram 300 from FIG. 3 shows the drain-source voltage V DS along an abscissa 301 and the drain-source current I DS along an ordinate 302.
- a first curve 303 is shown in diagram 300, which reflects the characteristic curves of the circuit arrangement according to the invention.
- a second curve 304 shows the current-voltage characteristic for the circuit arrangement 100 from FIG. 1 known from the prior art. 3 thus shows different operating states and trajectories in the output characteristic field of the clock transistors 205, 206 from FIG. 2 and the clock transistor 105 from FIG. 1 during the rising clock edge of CLK at a low level
- circuit arrangement 200 the charges occurring in the circuit arrangement 100 on the parasitic capacitances and the unfavorable operating states of the transistors according to FIG. 1 are avoided, as a result of which shorter propagation times according to the invention are achieved.
- circuit arrangement 200 differs from FIG. 1 in FIG.
- the static operation of the circuit is instead ensured by two actively operated n-MOS transistors 211, 212, which form a bypass with respect to the input transistors 207, 208 and are minimally dimensioned, similar to transistor 108 according to FIG.
- a circuit arrangement 400 according to a second exemplary embodiment of the invention is described below with reference to FIG.
- the essential difference between the circuit arrangement 400 shown in FIG. 4 and the circuit arrangement 200 shown in FIG. 2 can be seen in the connection of the first and second n-MOS bypass field-effect transistors 211, 212.
- the gate connection of the first n-MOS bypass field-effect transistor 211 is coupled to the second source / drain connection of the third p-MOS switch field-effect transistor 223.
- the first source / drain connection of the first n-MOS bypass field-effect transistor 211 is coupled to a second source / drain connection of the first n-MOS logic field-effect transistor 207.
- the second source / drain connection of the first n-MOS bypass field-effect transistor 211 is coupled to the second source / drain connection of the first n-MOS feedback field-effect transistor 209.
- the interconnection of the second n-MOS bypass field-effect transistor 212 is modified in FIG. 4 compared to FIG.
- the gate connection of the second n-MOS bypass field-effect transistor 212 is coupled to the second source / drain connection of the fourth p-MOS switch field-effect transistor 225, and is the first source / drain Connection of the second n-MOS bypass field-effect transistor 212 to the second source / drain connection of the second n-MOS logic Field effect transistor 208 coupled.
- the second source / drain connection of the second n-MOS bypass field-effect transistor 212 is coupled to the second source / drain connection of the second n-MOS feedback field-effect transistor 210.
- both source / drain connections of the bypass field-effect transistors 211, 212 are therefore free of coupling to a reference potential.
- the source connections of the bypass transistors 211, 212 are not brought to the electrical ground potential 217, but rather are coupled to the drain contacts of the transistors 209, 210.
- the functionality of the circuit arrangement 400 thus essentially corresponds to that from FIG. 2, the stack effect acting in the switched-off branch, as a result of which the leakage current in this path is reduced.
- the circuit arrangement 400 therefore represents a particularly energy-saving implementation of the circuit arrangement according to the invention.
- a circuit arrangement 500 according to a third exemplary embodiment of the invention is described below with reference to FIG.
- the pulse generator subcircuit 201 and the switching subcircuit 202 are provided as in FIG.
- the flip-flop subcircuit 501 according to FIG. 5 has been modified compared to FIG.
- the flip-flop subcircuit 501 from FIG. 5 has a first n-MOS protection field-effect transistor 502 and a second n-MOS protection field-effect transistor 503.
- a first source / drain connection of the first n-MOS protection field-effect transistor 502 is coupled to the second source / drain connection of the first p-MOS flip-flop field-effect transistor 227.
- the second source / drain connection of the first n-MOS protection field-effect transistor 502 is connected to the first source / drain Connection of the first n-MOS flip-flop field-effect transistor 228 coupled.
- the gate connection of the first n-MOS protection field-effect transistor 502 is coupled to the gate connection of the third n-MOS switching field-effect transistor 224.
- a first source / drain connection of the second n-MOS protection field-effect transistor 503 is coupled to the second source / drain connection of the second p-MOS flip-flop field-effect transistor 229, a second source / drain Connection of the second n-MOS protection
- Field effect transistor 503 is coupled to the first source / drain terminal of the second n-MOS flip-flop field effect transistor 230.
- the gate connection of the second n-MOS protection field-effect transistor 503 is coupled to the gate connection of the third p-MOS switching field-effect transistor 225.
- transistor 221 can become conductive in the circuit arrangement 200.
- transistor 230 is also conductive and a cross current can flow. By adding the protective field-effect transistor 503, this current can no longer flow.
- the transistors 502, 503 are dimensioned as small as possible.
- the circuit arrangement 500 is improved due to the measure taken with the improved output stage compared to the circuit arrangements known from the prior art with regard to speed and dynamic power loss. In particular, there are no longer any series circuits made of p-MOS transistors in the output stage. This increases the robustness of the Arrangement against parameter fluctuations and the influence of interference signals.
- circuit arrangement 101 pulse generator subcircuit 102 flip-flop subcircuit 103 switching subcircuit 104 clock signal input 105 n-MOS clock field-effect transistor 106 first n-MOS logic field-effect transistor 107 second n-MOS logic field-effect transistor 108 n-MOS Bypass field-effect transistor 109 first n-MOS signal transfer field-effect transistor 110 second n-MOS signal transfer field-effect transistor 111 first p-MOS clock field-effect transistor 112 first p-MOS feedback field-effect transistor 113 second pM S-clock field-effect transistor 114 second p-MOS feedback field-effect transistor 115 ground potential 116 supply potential 117 first p-MOS switching field-effect transistor 118 first n-MOS switching field-effect transistor 119 second p-MOS switching field-effect transistor 120 second n-MOS switching field-effect transistor 121 third p-MOS switching field-effect transistor 122 third n-MOS switching field-effect transistor 123 fourth p-MOS switching field-effect
Landscapes
- Logic Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/598,811 US7764102B2 (en) | 2004-03-12 | 2005-02-16 | Pulse-generator circuit and circuit arrangement |
EP05714981A EP1733475A1 (de) | 2004-03-12 | 2005-02-16 | Pulsgenerator-schaltkreis und schaltkreis-anordnung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004012223A DE102004012223A1 (de) | 2004-03-12 | 2004-03-12 | Pulsgenerator-Schaltkreis und Schaltkreis-Anordnung |
DE102004012223.7 | 2004-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005088837A1 true WO2005088837A1 (de) | 2005-09-22 |
Family
ID=34895311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2005/000263 WO2005088837A1 (de) | 2004-03-12 | 2005-02-16 | Pulsgenerator-schaltkreis und schaltkreis-anordnung |
Country Status (4)
Country | Link |
---|---|
US (1) | US7764102B2 (de) |
EP (1) | EP1733475A1 (de) |
DE (1) | DE102004012223A1 (de) |
WO (1) | WO2005088837A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005063097B4 (de) * | 2005-12-30 | 2014-09-04 | Infineon Technologies Ag | Gepulstes statisches Flip-Flop |
US8248107B2 (en) * | 2010-03-11 | 2012-08-21 | Altera Corporation | High-speed differential comparator circuitry with accurately adjustable threshold |
US8692581B2 (en) * | 2011-06-28 | 2014-04-08 | Agilent Technologies, Inc. | Constant switching current flip-flop |
TWI520495B (zh) | 2013-06-06 | 2016-02-01 | 財團法人工業技術研究院 | 非石英時脈產生器及其運作方法 |
KR20150019872A (ko) * | 2013-08-16 | 2015-02-25 | 에스케이하이닉스 주식회사 | 시프트 레지스터 |
US9729129B2 (en) * | 2014-12-05 | 2017-08-08 | Bhaskar Gopalan | System and method for reducing metastability in CMOS flip-flops |
KR102562118B1 (ko) * | 2018-06-26 | 2023-08-02 | 에스케이하이닉스 주식회사 | 신호 수신 회로 |
US10965383B1 (en) * | 2020-01-02 | 2021-03-30 | Qualcomm Incorporated | Zero hold time sampler for low voltage operation |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6111444A (en) * | 1998-08-20 | 2000-08-29 | International Business Machines Corporation | Edge triggered latch |
US6232810B1 (en) * | 1998-12-08 | 2001-05-15 | Hitachi America, Ltd. | Flip-flop |
US20020024368A1 (en) * | 2000-08-23 | 2002-02-28 | Kim Kyu-Hyoun | Flip-flop circuits having digital-to-time conversion latches therein |
US6633188B1 (en) * | 1999-02-12 | 2003-10-14 | Texas Instruments Incorporated | Sense amplifier-based flip-flop with asynchronous set and reset |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4910713A (en) * | 1988-06-27 | 1990-03-20 | Digital Euipment Corporation | High input impedance, strobed CMOS differential sense amplifier |
DE69532377D1 (de) * | 1995-10-12 | 2004-02-05 | St Microelectronics Srl | Implementierung einer Flip-Flop-Schaltung niedrigen Verbrauchs und hoher Packungsdichte, insbesondere für Standardzellen-Bibliotheken |
US6107853A (en) * | 1998-11-09 | 2000-08-22 | Texas Instruments Incorporated | Sense amplifier based flip-flop |
JP2000299623A (ja) * | 1999-04-13 | 2000-10-24 | Hitachi Ltd | 半導体集積回路装置 |
US6448829B1 (en) * | 2001-06-07 | 2002-09-10 | Sun Microsystems, Inc. | Low hold time statisized dynamic flip-flop |
-
2004
- 2004-03-12 DE DE102004012223A patent/DE102004012223A1/de not_active Withdrawn
-
2005
- 2005-02-16 EP EP05714981A patent/EP1733475A1/de not_active Withdrawn
- 2005-02-16 WO PCT/DE2005/000263 patent/WO2005088837A1/de active Application Filing
- 2005-02-16 US US10/598,811 patent/US7764102B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6111444A (en) * | 1998-08-20 | 2000-08-29 | International Business Machines Corporation | Edge triggered latch |
US6232810B1 (en) * | 1998-12-08 | 2001-05-15 | Hitachi America, Ltd. | Flip-flop |
US6633188B1 (en) * | 1999-02-12 | 2003-10-14 | Texas Instruments Incorporated | Sense amplifier-based flip-flop with asynchronous set and reset |
US20020024368A1 (en) * | 2000-08-23 | 2002-02-28 | Kim Kyu-Hyoun | Flip-flop circuits having digital-to-time conversion latches therein |
Also Published As
Publication number | Publication date |
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DE102004012223A1 (de) | 2005-09-29 |
US7764102B2 (en) | 2010-07-27 |
US20070279115A1 (en) | 2007-12-06 |
EP1733475A1 (de) | 2006-12-20 |
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