5 results about "Signal delay" patented technology

Disclosed herein is a semiconductor-device manufacturing method including the steps of: computing a capacitance, a resistance as well as capacitance and resistance variations as quantities generated as a result of changing the physical layout of a semiconductor integrated circuit in a range determined in advance; dividing the physical layout of the semiconductor integrated circuit into functional blocks and analyzing the physical layout in the functional-block units; computing signal delays for each of the functional blocks from the computed capacitance, the computed resistance as well as the computed capacitance and resistance variations and from a delay table provided for element and wire sections of each of the functional blocks; and finding signal delays in all the functional blocks composing the semiconductor integrated circuit on the basis of the signal delay computed for each of the functional blocks and the basis of a result of the analysis carried out on the physical layout.

Provided is a transmission circuit which can adjust a difference between signal delay amounts in the amplitude path and the phase path with a low power consumption. An amplitude modulation section 15 amplitude-modulates a phase modulation signal outputted from a phase modulation section 14 with a voltage control signal provided by a regulator 13 to generate a transmission signal for an output of an antenna. Similarly, a feedback signal generation section 16 amplitude-modulates the phase modulation signal with the voltage control signal to generate a feedback signal FB. The signal FB is fed back to a delay adjustment section 12 and used for calculating and adjusting the difference between the signal delay amounts in the amplitude path and the phase path. The feedback signal generation section 16 is attained by a power amplifier having the same configuration as the amplitude modulation section 15 and a smaller circuit scale.

The invention discloses an integrated ultra-small network wireless data transmission current meter. The current meter sensor is provided with a propeller, a light emitting source, a receiving photodiode, and a conducting optical fiber, and is characterized by further provided with a microcontroller, a signal conditioning circuit, and a wireless data transmission circuit. A photoelectric propeller-type flow velocity sensor emits a modulated light source. After being treated by filtering, demodulating, amplifying, and shaping, a received reflected signal forms a standard TTL signal connected tothe microcontroller. The wireless data transmission circuit is consisted of a wireless network communication control chip, a radio frequency chip, and a transmitting antenna. The software of the microcontroller is equipped with functions such as signal modulation, signal delay, regular count, data processing, power management, data transmission control, and anti-interference. According to the integrated ultra-small network wireless data transmission current meter, a flow velocity measuring device composed of a plurality of components is optimized into the integrated ultra-small network wireless data transmission current meter, and wireless flow velocity measuring is realized. A single current meter supports point-to-point wireless networking, and multiple current meters support star-type wireless networking, which can be uploaded to a local area network or the Internet to realize network management.