Exercises

I. Translate the following sentences into Chinese.

1. If analog signals are to be transmitted digitally, they first have to be sampled at a specified rate and further converted to discrete amplitude samples by quantization.

2. Linear filters amplify or attenuate selected spatial frequencies, can achieve such effects as smoothing and sharpening, and usually form the basis of re-sampling and boundary detection algorithms.

3. Stability and repeatability are fundamental attributes of digital circuits, however, and the necessary accuracy can be obtained in a digital version of the modulator by an appropriate choice of word length to represent the signals.

4. The first observation is made on the fundamental relationship between the nature of system and the periodicity of its frequency response: a continuous system has an aperiodic frequency response, while a discrete system has a periodic frequency response.

5. The main function of the receiver is to extract the input message signal from the degraded version of the transmitted signal coming from the channel.

Ⅱ. Choose the word or phrase that is closest in meaning to the underlined part.

1. Roughly speaking, the transistor can be likened to an electronically controlled valve whereby energy applied to one connection of the valve enables energy to flow between two other connections.

A. related

B. linked

C. analogized

D. viewed

2. While third party design tools were available, there was not an effective link from the third party design tools to the layout and actual semiconductor process performance characteristics of the various ASIC manufacturers.

A. When

B. Although

C. As

D. Since

3. These steps, implemented with a level of skill common in the industry, almost always produce a final device that correctly implements the original design, unless flaws are later introduced by the physical fabrication process.

A. practiced using skills generally available in the industry

B. commonly performed at levels of skilled personnel in the industry

C. realized with the skillful common level in the industry

D. carried out by skills commonly used in the industry

4. A second major step would be to develop design specifications that consider the functionality of the human with the same degree of care that has been given to the rest of the system.

A. develop design procedures to account for the human behavior and activities

B. promote design arrangements and take the human factors into consideration

C. make used of design steps that respect the human functionality

D. draft and effect design requirements that take into account the human functionality

5. Compared with most of the textbooks at the introductory level of RF analog design, this book presents some hands-on experiences on the design issues that really work and has been proved by manufactured chips.

A. this book provides some experiences at hand on the issues encountered in design

B. this book provides some actually working experiences about the design problems

C. this book presents some available experiences over the design problems

D. this book presents some issues concerning design experiences that are handed over

6. For a decade there has been a search for a programmable processor which, given the cost and volume constraints, is general enough to be programmed with different algorithms.

A. with controlled measures of price and magnitude

B. given the condition of risk and number

C. given the constants of charge and weight

D. given the limits of price and size

7. In a properly designed DC amplifier the effect of transistor parameter variation, other than Ico, may be practically eliminated if the operating point of each stage is adjusted so that it remains in the linear operation range of the transistor as temperature varies.

A. transistor

B. amplifier

C. Ico

D. parameter