摘要:
A digitally compensated direct-conversion receiver includes devices for generating digital samples of a base-band in-phase signal and a base-band quadrature signal and for detecting the presence of a second-order product signal produced by an amplitude-modulated interfering signal. Also, the apparatus comprises a device for digitally compensating the digital samples by removing the second-order product signal, thereby producing compensated digital samples. In one method of digitally compensating samples of an information signal quadrature-modulating a carrier signal, estimated samples of a second-order product from a switched carrier signal are formed by averaging the digital samples during two time periods and by determining a time of ramps in the in-phase and quadrature signals that occur between the time periods due to the interfering signal. The digital samples may be differentiated and the results smoothed in determining the time of the ramps. In another apparatus, the estimated samples of the second-order product signal are produced by a device for averaging a square of a difference between respective digital samples of the in-phase signal and the quadrature signal, thereby determining an amplitude of the amplitude-modulated carrier signal, and a device for combining the amplitude and the digital samples, thereby generating the estimated samples.
摘要:
A microphone bias current detection circuit includes: a microphone circuit 18; an amplifier 10 having a first output and a second output, the first output is coupled to the microphone circuit 18 for providing a bias current to the microphone circuit 18, the second output provides a sampled current Is proportional to the bias current; a first switch 30 having a first end coupled to the second output of the amplifier 10; a resistor 38 having a first end coupled to a second end of the first switch 30; and a second switch 32 coupled between the first end of the resistor 38 and a reference current source.
摘要:
An apparatus supporting both identification of a battery type and communications over an interface between a battery and an electronic device is disclosed. The electronic device includes a processor for communicating with communications circuitry of the battery. Identification circuitry associated with the processor enables a determination of the type of battery with which the electronic device is connected. If a “smart” battery capable of carrying out serial communications with the electronic device is connected, the electronic device further provides means for carrying out communications between the processor and the communication circuitry of the battery.
摘要:
A wireless device, such as a mobile phone, and a method for operating the wireless device to access a media option in a media player, comprising the steps of:providing a list of different media options, where each option includes a media channel or item;selecting a media channel or item to present;scanning a plurality of different types of radio signal bearers for detecting access of the selected media channel or item;selecting one of said different types of bearers in accordance with stored selection criteria;presenting the media channel or item as received over the selected bearer.
摘要:
A method of recommending new media to a user based on various information stored and/or collected by, for example, a mobile phone is provided. More particularly, the invention provides a method of recommending new media based on information such as, for example, the content of sent and received text messages, previously viewed sound and/or video clips, location, content of emails, environmental information such as temperature or pressure, etc. Accordingly, the invention facilitates the use of information generated by a user during use of a mobile phone for recommending media to the user.
摘要:
A method of generating a video-based diary of a user's activities based on various information stored and/or collected by a mobile phone. More particularly, the invention provides a method of generating a video-based diary of a period of time based on information such as, for example, incoming, outgoing, and missed calls, voicemails, sent and received text messages, pictures, sound and/or video clips, location, emails, etc. The format and content included in the generated video-based diary can be predetermined by the user so that only desired stored information is included in the video-based summary. The generated video-based diary can be utilized by the user in the future as a reference for remembering past events. The generated video-based diary can also be uploaded via the phone to a blog, if so desired.
摘要:
Digital, serial communication over an interface between an electronic device (102) and a battery (103) attached thereto comprises transmission of bytes (300) consisting of a number of bits. Each bit is defined by one of a high level and a low level, and a leading bit (304) of each byte is of a first one of said high and low levels. The method comprises the step of transmitting the other of the high and low levels for a first period of time (403, 405) immediately prior to said leading bit (304). When the leading bit of a byte is always of the same level (i.e. either high or low) and a period of the opposite level precedes the leading bit, it is very easy and simple to ensure that the sending as well as the receiving party is ready for the communication to take place and adjusted to the actual direction of communication.
摘要:
A method and apparatus for maintenance charging a battery is disclosed. A battery is fully charged using conventional CC-CV techniques and subsequently is maintenance charged by applying a first maintenance voltage to the battery for a first predetermined time period. If desired, a second maintenance voltage may be applied to the battery for a second predetermined time period. An apparatus for maintenance charging a battery utilizes a timer and a charge controller to apply a maintenance voltage to a battery for a predetermined time period.
摘要:
A server receives a request for transfer or streaming of a data file sent in the local network from a portable communication device. The server provides the portable communication device with an identifier allowing the data file to be located on the server via a wide area network and transfers or streams the file over the local network to the portable communication device.
摘要:
Systems and methods of managing memory usage on a computing device include obtaining a data file having a first quality and a first file size. A modified quality data file is automatically generated from the obtained data file responsive to obtaining the data file. The modified quality data file has a second quality and a second file size, the second file size being less than the first file size. The modified quality data file is automatically stored on a memory of the computing device and the obtained data file is automatically transferred to a storage device remote from the computing device.