Stagger Pulse Generation Circuit With Adjustable Oscillation Period
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Solution Overview
Problem
Existing semiconductor circuit designs using synchronous or asynchronous signals to generate equidistant stagger signals face limitations in delay controllability and increased circuit layout area and power consumption.
Innovation Solution
A pulse generation circuit comprising an oscillation circuit, a period adjustment circuit, and a pulse conversion circuit that generates a pulse signal with a variable period, allowing for adjustable delay without requiring integer multiple clock periods, thereby optimizing circuit layout area and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If synchronous signals are used to generate equidistant stagger signals, then the delay between signals is an integer multiple of the clock period, but the controllability of the delay is poor
Solution Approach 1:
The patent uses a ring oscillator whose oscillation period can be dynamically adjusted by controlling the number of inversion loops in the feedback path. This allows the delay between stagger signals to be continuously variable rather than fixed at integer multiples of a clock period, thereby improving delay controllability while maintaining a relatively simple circuit structure.
2Ease of operation
If asynchronous signals are used to generate equidistant stagger signals, then the delay between signals is controllable, but the area of the circuit layout and power consumption are significantly increased
Solution Approach 1:
The ring oscillator serves multiple functions: it generates the oscillation signal, provides adjustable delay through variable inversion loops, and can be controlled by a simple control signal. This multi-functionality eliminates the need for separate delay control circuits that would increase area and power consumption, while still achieving controllable delay between stagger signals.
3Ease of operation
If asynchronous signals are used to generate equidistant stagger signals, then the delay between signals is controllable, but the power consumption of the circuit is significantly increased
Solution Approach 1:
The patent changes the parameter of the ring oscillator by adjusting the number of inversion loops in the feedback path, which directly controls the oscillation period and thus the delay between stagger signals. This parameter-based control method is more energy-efficient than using complex asynchronous delay circuits, as it relies on simple switching of existing oscillator components rather than activating additional power-consuming delay elements.
Data Source
AI summary
A pulse generation circuit and stagger pulse generation circuit are provided. The pulse generation circuit includes: an oscillation circuit that receives a control signal and generates a first oscillation signal according to the control signal; a period adjustment circuit that receives the first oscillation signal and a magnification selection signal and outputs a second oscillation signal, the period of the second oscillation signal is a period of the first oscillation signal or a period of an oscillation adjustment signal, and the second oscillation signal is selected according to the magnification selection signal; and a pulse conversion circuit that receives the second oscillation signal and outputs a pulse signal, the pulse of the pulse signal is generated according to the rising or falling edge of the second oscillation signal, and the pulse period of the pulse signal is the same as the oscillation period of the second oscillation signal.