Delay Amplifier

Abstract

The invention provides a delay amplifier, which is characterized by comprising one or more stages of amplifying circuits, wherein the one-stage or multi-stage amplification circuit at least comprisesone-stage delay amplification circuit based on a self-timing oscillation ring; the time-delay amplifier further comprises an input-stage time-delay amplification circuit. If the input delay is matchedwith the set parameters of the amplifying circuit, the amplifying circuit serves as an input-stage delay amplifying circuit; and if the input delay is not matched with the set parameters of the amplifying circuit, the independent input-stage delay amplifying circuit can convert the unmatched input delay into a delay signal matched with the set parameters of the amplifying circuit. According to the implementation and control mode of the time-delay amplification circuit, the flexibility and stability of the time-delay amplifier can be improved.

Description

technical field [0001] The present invention relates to the field of semiconductor integrated circuits, in particular to a delay amplifier, and in particular to a design method of a delay amplifier circuit. Background technique [0002] With the development of CMOS technology, the power supply voltage of the chip is decreasing, and the operating speed of the transistor is increasing. Due to the increased operating speed of transistors and the reduction of transmission delay, the minimum time interval of digital signals is getting smaller and smaller. Therefore, the use of time intervals to transmit data information will have more advantages than the traditional use of voltage amplitude to transmit data information. A time-to-digital converter (TDC) can be used to process delay information between digital signals and can replace the analog-to-digital converter (ADC) used to process digital signal amplitude information. [0003] A typical TDC is a time-to-digital converter an...

AI Technical Summary

Problems solved by technology

Its advantage is that it can amplify tiny delay signals. The disadvantage is that the linearity of amplification is poor, and the variable range of input delay is small; the delay amplifier circuit based on pulse sequence can realize the superposition of multiple delays, but It is difficult to work alone, and the follow-up TDC circuit needs to be coordinated to complete; based on the delay amplifier circuit of the variable delay chain or the variable frequency ring oscillator, the delay of the delay unit is different before and after switching, or the oscillation cycle is different. It has the characteristics of large time-delay amplification range, good controllability, and good resistance to PVT changes.

However, the traditional ring oscillator based on an inverter or a NAND gate has a frequency limited by the inverter or a NAND gate, and its speed is limited.

In the process of changing the size of the inverter at the same time, the adjustable range depends on the adjustable range of the inverter size. When multiple magnifications are required, more inverter circuits need to be integrated to increase the adjustable capability. Therefore Delay can be amplified with weaker options

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