The transceiver interface circuit in this dissertation is the most important part of USB2.0 interface which is a high speed mixed signal circuit, and it is realized by TSMC 0.25um mixed CMOS process technology.

RTD-based circuits have important applications in digital circuit,mixed signal circuit and optoelectronic system with the characteristics of ultra-high speed,low power and self-latching.

It is designed for GB10235-88. The anti-shock electricity-saving device for arc welding transformer equiped with a MAW transformer has a unique starting signal circuit. The main parameters are ensured (starting sensitivity and starting time) and come up to the international required values.

S O Itechnology alsoappropriate for the Gigabit D R A M generation ,the system on chip ,and radiation hard circuits , M E M S,ana log/ mixed signal circuits,sm art power I C,portable teleco m m unication systems,high tem perature electronicsand quantu m devices .

同时，该技术也适用于千兆位 D R A M 、片上系统、以及抗辐射加固电路、微电子机械系统、模拟／ 混合信号电路、智能功率集成电路、便携式通讯系统、高温电子学和量子器件等。

Among the many testing methods of analog and mixed signal circuits booming up in recent years, the pseudorandom testing technique is easier to generate testing stimuli and the current-based testing method could magnify the response differences between fault-free circuits and faulty circuits.

Small signal equivalent circuit model and modulation properties of vertical cavity surface emitting lasers(VCSEL's) are presented. The modulation properties both in analytic equation calculation and in circuit model simulation are studied. The analytic equation calculation of the modulation properties is calculated by using Mathcad program and the circuit model simulation is simulated by using Pspice program respectively.

The primary functions and interfaces of PM8316are introduced in this paper,the circuit figures of the chief signals of PM8316in the SDH terminal equipment is also presented.

The main contents are as follows:The structure of mixed-signal circuit which newly-defined in IEEE1149.4 Std is analyzed in detail, especially anolog boundary module and test bus interface circuit.

By using AC small signal circuit model and appropriate numerical simulation method, the dynamic operating characteristics are investigated, and some influenced factors are analyzed.

For validation, the strategy has been successfully applied to several mixed-signal circuit examples.

This paper presents an investigation of dynamically reconfigurable mixed-signal circuit constructed using a digital control system and the new technology of Field Programmable Analog Arrays (FPAA).

An Approach for Determining PHEMT Small-Signal Circuit Model Parameters Up to 110GHz

The rapidly evolving role of analog signal processing has spawned off a variety of mixed-signal circuit applications.

Noise caused by the electromagnetic coupling of digitally injected signals into substrate is a key problem in the design of large mixed-signal circuits.

With the increasing complexity of analog/mixed-signal circuits, test program development time is now a major obstacle in achieving shorttime-to-market, while production testing cost is a prominent factor in total production cost.

The problems of testing mixed-signal circuits are becoming increasingly intractable as circuit density and functionality increase.

Although VHDL has been primarily devoted to digital circuit design, it can also be applied to certain mixed-signal circuits.

This survey paper reviews work to date in the area of programmable analog and mixed-signal circuits.

A low-signal equivalent circuit of a GaAs MESFET is suggested.

A model of enhancement-mode GaAs MESFET (EFET) for low power consumption and low noise applications has been obtained by using a small-signal equivalent circuit whose component values are derived from the physical parameters and the bias condition.

Accurate modeling and efficient parameter extraction of a small signal equivalent circuit of MOS transistors for high-frequency operation are presented.

The small-signal equivalent circuit is based on the quasi-static approximation which was found to be adequate up to 10 GHz for MOS transistors fabricated by a 20 GHz cutoff frequency technology.

This paper describes a scalable small-signal equivalent circuit for 0.25 μm gatelength Double Heterojunction delta-doped PHEMTs.

This paper describes the circuit design of a 4GHz uncooled paramp for satellite communication earth station. The skin effect of the varactor series resistance is considered and the designing approach of the double-tuned signal circuit discussed as well. The paramp includes a varactor with a zero bias cut-off frequency of greater than 650GHz, a 57GHz Gunn oscillator as a pump source and a low loss four-port circulator with the insertion of 0.1-0.12dB. The first stage paramp is cooled down to -40℃ by means of...

This paper describes the circuit design of a 4GHz uncooled paramp for satellite communication earth station. The skin effect of the varactor series resistance is considered and the designing approach of the double-tuned signal circuit discussed as well. The paramp includes a varactor with a zero bias cut-off frequency of greater than 650GHz, a 57GHz Gunn oscillator as a pump source and a low loss four-port circulator with the insertion of 0.1-0.12dB. The first stage paramp is cooled down to -40℃ by means of thermoelectric device. The results obtained are: the noise temperature of the paramp itself is 23-25°K at center frequency; the overall noise temperature of the system is 37-47°K with the consideration of the loss of the input circuit and the contribution of the post-stage.

A new circuit of angle transducer is described. It is a phase-in-verted rectifying and filtering circuit consisting of a selsyn, diodes, resistors andcapacitors etc. The transducer can change angle displacement into d. c. voltage. Thereis a relationship of sine function between d. c. voltage output and angle displace-ment input in every operating intervals. The main advantage of the transducer is thatit can eliminate the null-position voltage, which exists in the form of the residuala. c. voltage output in the...

A new circuit of angle transducer is described. It is a phase-in-verted rectifying and filtering circuit consisting of a selsyn, diodes, resistors andcapacitors etc. The transducer can change angle displacement into d. c. voltage. Thereis a relationship of sine function between d. c. voltage output and angle displace-ment input in every operating intervals. The main advantage of the transducer is thatit can eliminate the null-position voltage, which exists in the form of the residuala. c. voltage output in the case of using selsyn only, therefore the precision of themeasurement can be greatly improved. Besides, the circuit structure of the transdu-cer is simple. It is easy both in implementation and regulation. It is cheap in cost.In short, it is a simple, reliable, economical and practical angle transducer. In thispaper, the output characteristic (voltage-angle characteristic) of the circuit of angletransducer is theoretically analysed in detail and is studied by experiments. Quanti-tative relationships between output characteristic and parameters of the circuit areobtained, and simple and practical formulas for design are derived. For example,output characteristic is analysed and operating intervals are divided under the load-ed and non-loaded conditions. The load effects upon the range of operating inter-vals are discussed. The problems such as regulation of the transfer coefficient and"zero", extension and reduction of range, angle and voltage displacement of outputcharacteristic are also discussed. Therefore, output characteristic curve can be moved,extended and reduced along α-axis or U-axis on Decker coordinate plane. Consequ-ently, the transducer can be made to satisfy the design specifications presented bythe users. Based on theoretical and experimental study, principles of choosing circuitcomponents are presented according to the design formulas derived and the designdemands, and a new method of determining parameters of components by means ofthe calculation and the experiment is found. In the end, a design example of angletransducer circuit is given.

Operating principle, emissive circuit, receiving circuit, controlling circuit and time-base circuit of QH-87 Sound-Speed Measurer made in our own laboratary were introduced breifly in this paper.