摘要:
Data transmission system comprising a data transmitter (1) including:swept frame display means (2), anda generator of composite video signals (20, 22) to control the operation of said swept frame display means (2); anda portable information detection device (7) for receiving said transmitted data by said data transmitter (1).The data transmitter (1) further comprises means (23) for modulating at least one of the elementary signals constituting said composite video signals with the data to be transmitted, and said information detection device (7) further comprises any inductive antenna (44, 45) for detecting said modulated elementary signal.
摘要:
A highly stable frequency generator (G) comprises an oscillator (10) for generating a first frequency (F1), and further comprises a time base (BT) providing a time stable frequency signal which is independent of the temperature, and a feedback circuit arranged to provide a first number of pulses (n.sub.T) coming from the oscillator (10) to a comparing circuit (13), a circuit (14) for providing a reference number of pulses (N.sub.T) to said comparing circuit (13), and a circuit (13,15,16) providing a correction signal (Sc) as a function of the difference (.DELTA.) between the first number (n.sub.T) and the reference number (N.sub.T), the generator (G) further comprising a correction circuit (17) of the oscillation frequency (F1) of said first oscillator (10), this correction circuit being controlled by said control signal (Sc).
摘要:
The invention concerns a subassembly intended to be mounted in a portable device enabling the reception and/or emission of radio diffused messages as well as the selection of predetermined digital information. This subassembly comprises an antenna (4) and position sensors (6.1 to 6.12) disposed an a same isolating support (30). The subassembly is realised in manner such that mutual perturbations created by the combination of the antenna (4) and the position sensors (6.1 to 6.12) are avoided. The invention further relates to a horological piece (1) comprising such a subassembly wound in a peripheral region of the watch case (2).
摘要:
The radio-frequency signal reception and/or transmission device includes an antenna (8) for picking up or transmitting radio-frequency signals, a bandpass filter (9), at least one low noise amplifier (11) for amplifying the filtered signals, an oscillator stage (1) for generating first high frequency signals (SVCO), at least one frequency divider (14) for dividing by M the frequency of the first signals in order to generate second high frequency signals (SD), where M is an integer number greater than 1, at least a first mixer unit (12) for mixing the filtered and amplified radio-frequency signals (SR) with the first high frequency signals (SVCO), and at least a second mixer unit (13) for mixing the intermediate signals supplied by the first mixer unit with the second high frequency signals in order to produce baseband signals (IR, QR). The stage oscillator (1) is configured to generate first high frequency signals (SVCO), whose frequency is outside the frequency band of the bandpass filter and higher than the frequency of the received radio-frequency signals by a factor M/N comprised between 1 and 2, where N is an integer number greater than 1.
摘要:
The radio-frequency signal frequency conversion device generates intermediate complex signals (IF) for a correlation stage of a low power RF receiver. In order to do this, the device includes a first selective pass-band filter for filtering radio-frequency signals picked up by an antenna. A frequency synthesizer generates first and second high frequency signals, wherein the frequency of the first signals is higher than the frequency of the second signals. This synthesizer receives reference signals from an oscillator unit. A first mixer unit mixes the radio-frequency signals with the first signals in order to generate frequency-converted signals. A second pass-band filter filters the signals from the first mixer unit, and provides signals to a second mixer unit to mix them with the second high frequency signals. Finally, shaping means for the signals provided by the second mixer unit generate the intermediate signals. The second filter is a not very selective active filter, which is integrated, in an RF/IF integrated circuit with the first and second mixer units, the signal shaping means, and certain parts of the synthesizer and the oscillator unit.
摘要:
The present invention concerns an antenna arrangement (29) including: an antenna (A) able to transmit data in the form of a radiofrequency signal; a transmitter (32) including a preamplifier (33) and a first transistor (36) connected in cascade, this transmitter being able to provide a radiofrequency signal containing the data to be transmitted to the antenna; and coupling means (30) connected between the antenna and the transmitter, and including a phase lag circuit (42) able to achieve the coupling of the antenna and the transmitter. The coupling means further include switching means (43) connected between the system's earth and the source terminal of the first transistor of the transmitter, so as to be able to switch the latter to an ON state, respectively to an OFF state, when said antenna is, respectively is not, in transmission phase.
摘要:
The portable electronic device (1) allows functions and/or data of a vehicle to be controlled and managed. In order to do this, the portable device comprises, in a casing having an upper part (10) fixed, for example, in a removable manner on a lower part (11), means for wirelessly transmitting and receiving signals for short range personalised communication with the vehicle. It further comprises a microprocessor unit for processing functions and/or data of the device and of the vehicle, at least one display screen (3) having a portion which is visible from outside the casing for displaying different menus or data of the device or of the vehicle, and manual control means (5, 6) for controlling the execution of functions of the microprocessor unit. A power source, such as a battery, is provided in the casing for supplying electric power to all the electronic components of the device. The manual control means comprise control keys (5) each having a touch-sensitive pad arranged on an inner face of the upper part (10) of the casing. Each control key may be individually activated by a finger of a user placed on the casing in a specified region of the touch-sensitive pad to be activated. The control means further comprise at least one control button (6) which can be pressed, in particular to make the control keys (5) and the display screen (3) switch from an idle mode to an operating mode.
摘要:
There is disclosed a portable electronic instrument (1) including a case (2), at least one electronic unit (72, 74) housed inside the case, and at least a first input and/or output terminal (A; B) accessible from the exterior of the case and including an electrically conductive element (100) which is mounted so as to be mobile with respect to the case. The input and/or output terminal is adapted to be electrically connected to an input and/or output terminal (72A, 74A; 72B, 74B) of said electronic unit via a transmission line (I/OA; I/OB) and for allowing transmission of electric signals on the transmission line through the connecting element. The connecting element can occupy a first or second position in which the input and/or output terminal is respectively uncoupled from or coupled to the input and/or output terminal of the electronic unit. The portable electronic instrument further includes a transmission gate (TGA; TGB) inserted on the transmission line between the input and/or output terminal and the input and/or output terminal of the electronic unit, said transmission gate having a transmitting and non-transmitting state allowing the input and/or output terminal to be respectively coupled to or uncoupled from said input and/or output terminal of the electronic unit. A protective element (TVSA, TVSB) against electrostatic charges is also inserted on the transmission line between the input and/or output terminal and the transmission gate.
摘要:
The receiver (1) is for receiving radio-synchronous signals for adjusting the time base of a timepiece. The receiver includes an antenna (2) for receiving radio-synchronous signals, a low noise amplifier (3), connected to the antenna, a frequency conversion unit (7) for converting the frequency of the filtered and amplified incoming signals from the amplifier, and a processing unit (8) receiving data signals (data_out) from the conversion unit for adjusting the time base. The conversion unit includes a local oscillator stage (10) with a quartz (12) for supplying oscillating signals (Sm) at a determined frequency, a mixer unit (4) for mixing the incoming signals with the oscillating signals from the oscillator stage to generate intermediate signals (IF), a bandpass filter (5) for filtering the intermediate signals (IF), and a demodulator (6) receiving the filtered intermediate signals and supplying the data signals. The local oscillator stage is configured automatically by a control signal (Cm) from the processing unit to adapt the frequency of the oscillating signals (Sm) in accordance with the incoming radio-synchronous signal frequency, so that the intermediate signal (IF) frequency is within the frequency band of the bandpass filter.
摘要:
The receiver (1) for FSK modulation signals includes an antenna (2) for receiving modulated data or control signals, a low noise amplifier (3) for amplifying and filtering the signals picked up by the antenna, a local oscillator (6) with a quartz resonator (7) for supplying high frequency, in-phase signals (SI), and high frequency, in-quadrature signals (SQ), first and second mixers (4, 5) for mixing the high frequency, in-phase and in-quadrature signals with the filtered and amplified incoming signals, in order to generate intermediate signals (Im, Qm), and a filtering unit (12) for filtering the intermediate signals. The receiver can be configured to receive modulated data or control signals at low rate. The filtering unit supplies intermediate signals (IF, QF) filtered in a polyphase filter (13) to a first demodulation stage in medium or high rate mode, or intermediate, baseband signals filtered in the polyphase filter, which is converted into two low-pass filters (14, 15), to a second demodulation stage in low rate mode.