# US 2026/0100698 A1 · Dynamic high-speed flip flop

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- Number: US 2026/0100698 A1
- Document ID: US20260100698A1
- Status: Published application
- Kind: A1
- Application number: 18/908,295
- Filed: 2024-10-07
- Published: 2026-04-09
- Earliest claimed: 2024-10-07
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Peter Normand LABRECQUE; Anik SRIVASTAVA; Sumeer GOEL
- Web page: https://patentgrep.com/patent/US20260100698A1

## CPC

- H03K 3/013: Modifications of generator to prevent operation by noise or interference
- H03K 3/35625: {using complementary field-effect transistors}
- H03K 3/012: Modifications of generator to improve response time or to decrease power consumption
- H03K 3/0375: {provided with means for increasing reliability; for protection; for ensuring a predetermined initial state when the supply voltage has been applied; for storing the actual state when the supply voltage fails (digital storage cells each combining volatile and non-volatile storage properties G11C14/00)}
- H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M)

## Abstract

Aspects of the disclosure are directed to a dynamic master slave flip flop circuit. In accordance with one aspect, the disclosure includes a master latch section configured to receive an input signal asserted at a HIGH state of the input signal; a clock circuit coupled to the master latch section, the clock circuit configured to execute a positive clock transition of a clock signal; and a slave latch section coupled to the master latch section and the clock circuit, the slave latch section configured to transition a state (Q) signal from a LOW state to a HIGH state of the state (Q) signal subsequent to the positive clock transition.

## Claims

### Claim 1

An apparatus comprising:
a master latch section configured to receive an input signal asserted at a HIGH state of the input signal;
a clock circuit coupled to the master latch section, the clock circuit configured to execute a positive clock transition of a clock signal; and
a slave latch section coupled to the master latch section and the clock circuit, the slave latch section configured to transition a state (Q) signal from a LOW state to a HIGH state of the state (Q) signal subsequent to the positive clock transition.

### Claim 2 (depends on 1)

The apparatus of claim 1, further comprising a first slave latch transistor configured to implement a glitch mitigation in the slave latch section.

### Claim 3 (depends on 2)

The apparatus of claim 2, wherein the first slave latch transistor is housed within the slave latch section.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein the first slave latch transistor is a metal oxide semiconductor (MOS) transistor.

### Claim 5 (depends on 4)

The apparatus of claim 4, wherein the metal oxide semiconductor (MOS) transistor is an n-channel MOS (NMOS) transistor.

### Claim 6 (depends on 5)

The apparatus of claim 5, further comprising a second slave latch transistor housed within the slave latch section, the second slave latch transistor configured to gate the positive clock transition.

### Claim 7

An apparatus comprising:
means for receiving an input signal asserted at a HIGH state of the input signal at a master latch section, and at a slave latch section with a glitch mitigation;
means for executing a positive clock transition throughout the master latch section and the slave latch section; and
means for transitioning a state (Q) signal from a LOW state to a HIGH state of the state (Q) signal subsequent to the positive clock transition.

### Claim 8 (depends on 7)

The apparatus of claim 7, further comprising means for transitioning a complementary state (QB) signal from a first state to a second state subsequent to the positive clock transition.

### Claim 9 (depends on 8)

The apparatus of claim 8, further comprising means for receiving the input signal deasserted at a LOW state.

### Claim 10 (depends on 9)

The apparatus of claim 9, further comprising means for inputting the input signal.

### Claim 11

A method comprising:
receiving an input signal asserted at a HIGH state of the input signal at a master latch section, and at a slave latch section with a glitch mitigation;
executing a positive clock transition throughout the master latch section and the slave latch section; and
transitioning a state (Q) signal from a LOW state to a HIGH state of the state (Q) signal subsequent to the positive clock transition.

### Claim 12 (depends on 11)

The method of claim 11, wherein the positive clock transition is gated in a keeper circuit.

### Claim 13 (depends on 11)

The method of claim 11, wherein the positive clock transition is a rising edge of a periodic clock signal.

### Claim 14 (depends on 13)

The method of claim 13, wherein the periodic clock signal is established using a frequency reference.

### Claim 15 (depends on 11)

The method of claim 11, further comprising transitioning a complementary state (QB) signal from a first state to a second state subsequent to the positive clock transition.

### Claim 16 (depends on 15)

The method of claim 15, wherein the complementary state (QB) signal tracks a complement of the input signal with a first delay.

### Claim 17 (depends on 16)

The method of claim 16, wherein the state (Q) signal tracks the input signal with a second delay.

### Claim 18 (depends on 15)

The method of claim 15, further comprising receiving the input signal deasserted at a LOW state at the master latch section, and at the slave latch section with the glitch mitigation.

### Claim 19 (depends on 18)

The method of claim 18, further comprising inputting the input signal to the master latch section and to the slave latch section.

### Claim 20 (depends on 18)

The method of claim 18, wherein the input signal is received prior to a setup time margin relative to the positive clock transition.
