1 Electronic ballast ultrahigh frequency ( UHF ) can avoid the intrinsic problem of acoustic resonance of HID lamps.

2 A method for measuring the phase characteristics of ultrahigh frequency modulating light by optical phase shift is proposed.

3 All the average methods for measuring ultrahigh frequency are based on the processing of frequency, the method for which is frequency mixing or harmonic mixing.

4 An electron tube used to amplify or generate ultrahigh frequency by means of velocity modulation.

5 A method for measuring the phase characteristics of ultrahigh frequency modulating light by optical phase shift is proposed. It has the properties of high precision and strong practicability.

6 This paper presents that developing ultrahigh frequency pulse EDM generator of adjustable duty ratio by CPLD based on the characteristic of CPLD,[] complete hardware logistic.

7 The measurement of ultrahigh frequency is one of the difficulties in frequency measurement.

8 Electronic ballast with ultrahigh frequency (UHF) can avoid the intrinsic problem of acoustic resonance of HID lamps.

9 An electronic ballast with ultrahigh frequency (UHF) can avoid the intrinsic acoustic resonance problem of HID lamps.

10 The failure Phenomena of ultrahigh frequency and low noise transistor in mass production are described. The production results are discussed. Finally, the new technique are presented.

11 This article elaborates on the work principle of the three winding and brushless PMDC, developing speed controller with AT89C2051 at ultrahigh frequency, its electric circuit principles and software...