An Sang Hou

Publications (7)3.64 Total impact

• Article: A built-in-test scheme for evaluating the parameters of floating-gate MOS transistors

  An Sang Hou
  [show abstract] [hide abstract]
  ABSTRACT: In this paper, analog multiplexers, biasing circuit, decoders, a 16-bit analog-to-digital (A/D) converter, and a 32-bit advanced reduced instruction set computer (RISC) machine are employed to achieve a built-in-test scheme for evaluating the parameters of several floating-gate MOS transistors (FGTs). The feedback technology is applied so the parameters of FGTs can be evaluated with good accuracy. The proposed scheme does not require any matched components, and thus, it can be applied effectively to evaluate the parameters of multiple FGTs. The sampling time for each FGT is estimated to be 4.8 ms. Examples of analog-circuit applications are addressed to emphasize the necessity of the proposed scheme. Dynamic responses and static characteristics are demonstrated with experimental results.
  IEEE Transactions on Instrumentation and Measurement 07/2005; · 1.21 Impact Factor
• Article: The new design of AGC circuit for the sinusoidal oscillator with wide oscillation frequency range

  An Sang Hou, C.E. Lin
  [show abstract] [hide abstract]
  ABSTRACT: The typical automatic gain control (AGC) schemes are not suitable for the sinusoidal oscillator with wide oscillation frequency range. To solve this problem, the up-down counter, multiplying digital-to-analog converter, and high-speed comparators are employed to achieve the proposed AGC circuit, which corrects the complex roots of the overall system automatically to the imaginary axis of the complex frequency plane. The negative feedback technique with digital hardware is applied on the loop gain control. No low-pass filter is needed to detect the oscillation amplitude. Thus, this technique is suitable for the sinusoidal oscillator with wide oscillation frequency range. The oscillation frequencies ranging from 7 Hz to 1 MHz are tested with the proposed AGC circuit. The experimental results demonstrate the static characteristics and dynamic responses of the overall system.
  IEEE Transactions on Instrumentation and Measurement 11/2004; · 1.21 Impact Factor
• Source

  Available from: ncku.edu.tw

  Article: A real-time remote control architecture using mobile communication

  C.E. Lin, Chih-Ching Li, An-Sang Hou, Chih-Chen Wu
  [show abstract] [hide abstract]
  ABSTRACT: This paper presents a new development of mobile communication for application to remote data transmission and control. The concept of G³, including global positioning system, global system for mobile (GSM), and geographic information system, is proposed. In this paper, a GSM real-time control system for data uplink and downlink remote terminals is considered. The proposed system can be implemented on a PC-based or a μP-based to integrate into G³ configuration. This paper presents the system design and implementation with practical data verification. The proposed GSM real-time control system has accomplished a very reliable two-way point-to-point uplink and downlink data transmission within a 0.6-s time delay.
  IEEE Transactions on Instrumentation and Measurement 09/2003; · 1.21 Impact Factor
• Conference Proceeding: The new design of agc circuit for the sinusoidal oscillator with wide oscillation frequency range

  An Sang Hou, Wei-Fu Lai
  [show abstract] [hide abstract]
  ABSTRACT: First Page of the Article
  Instrumentation and Measurement Technology Conference, 2003. IMTC '03. Proceedings of the 20th IEEE; 06/2003
• Conference Proceeding: Design of frequency-to-voltage converter using successive-approximation technique

  C.E. Lin, An Sang Hou
  [show abstract] [hide abstract]
  ABSTRACT: In this paper, the current conveyors, up-down counter, and ultra high-speed D/A converter are employed to achieve the fast frequency-to-voltage converter (FVC). Based on the successive-approximation technique, the proposed FVC has short overall response time and does not require any matched components. The transient variations of input signal frequency can be detected. The output voltage is inversely proportional to the input signal frequency. The input signal frequency range from 50 Hz to 2 MHz is tested. The output ripple voltage is verified so little that no low-pass filter is needed. The experimental results demonstrate the static and dynamic characteristics of proposed FVC.
  Instrumentation and Measurement Technology Conference, 2003. IMTC '03. Proceedings of the 20th IEEE; 06/2003
• Conference Proceeding: A current conveyor design in wide bandwidth isolation amplifier

  C.E. Lin, An Sang Hou, Kai Shun Hsu
  [show abstract] [hide abstract]
  ABSTRACT: In this paper, the dual-channel optocoupler and current conveyors are employed to achieve the wide bandwidth isolation amplifier. The high gain feedback technique and pole-zero compensation are applied to overcome the inherent nonlinear characteristics of optocouplers and to obtain a good transient response. Its bandwidth is up to 563 kHz and the output response exhibits linear transfer characteristics. The mathematical model of proposed isolation amplifier is proposed. The dynamic responses and static characteristics are also demonstrated with experimental results.
  Instrumentation and Measurement Technology Conference, 2003. IMTC '03. Proceedings of the 20th IEEE; 06/2003
• Article: A real-time remote control architecture using mobile communication.

  Chin E. Lin, Chih-Ching Li, An Sang Hou, Chih-Chen Wu
  IEEE T. Instrumentation and Measurement. 01/2003; 52:997-1003.