2119 results about "Dividing circuits" patented technology

The invention relates to the technical field of radio fix radars, in particular to a millimetre wave time-division linear frequency modulation multi-object detection automobile anti-collision radar. The radar of the invention adopts full phase parameter receiving/emitting benchmark signal and time-division and time-sequence asynchronous control to receive/emit a dual-purpose quasi-light integrated medium lens antenna array, and scans the objects possible to be collided on the warning road surfaces by DSP according to lane scanning wave beam; the road situation photographing combined with the vehicle speed and GPS data MCU to control time-division n-passage modulation frequency and waveform millimetre wave linear locking phase frequency modulation; emission is carried out sequentially by R/T2, a circulator, a wave beam switch and the antenna array; echo passes through the antenna array, the wave beam switch, the circulator, the R/T1, low noise high amplifier, subharmonic mixing, middle amplifier and a time-dividing circuit and multi-object signal corresponding matching filter wave and is processed and controlled by MCU at DSP; when a plurality of road barriers are encountered, the orientation, distance and relative speed are determined by DSP restriction virtual warning; three-dimensional images are displayed by a CRT; the closer the distance of the object is, the higher the resolution is; the object which is closest to the vehicle is recognised; sound and light alarm are carried out when the distance is less than safety distance; when the distance is near to the dangerous distance, the vehicle can intelligently avoid the barrier or reduce the speed or brake; the radar of the invention can make a choice according to the control reference road situation, the vehicle speed and the GPS data, thus obviously improving the driving safety of the vehicle.

To provide an image pickup system having CCDs 25 driven at different frequencies respectively which can drive each CCD 25 with a predetermined frequency if a detachable camera head (or electronic endoscope) 28 is used and also can process a signal processing clock of a video processing circuit 29 with one type of clock. A drive signal of the predetermined frequency supplied to the CCD is produced via a generating circuit CXO 155 in the video processing circuit 29, a frequency dividing circuit 132 and a timing generator (T.G.) 131. A CCD signal outputted from the CCD 25 is inputted to a line memory 139 in a floating circuit 135. As a writing clock (WCK) of the line memory 139, the one which is divided in the frequency dividing circuit 132 to a frequency in accordance with the CCD 25 to be used is used, and as a reading clock (RCK), the one of one type of frequency is used without regard to the CCD 25 to be used. Hence, it is possible to perform the signal processing of a secondary circuit 136 of the line memory 139 and following ones always with a common generating clock.

Disclosed herein is a semiconductor device that includes a clock terminal supplied with a first clock signal from outside; a dividing circuit dividing a frequency of the first clock signal to generate a plurality of second clock signals that are different in phase from one another; a multiplier circuit multiplying the second clock signals to generate a third clock signal, the multiplexer having a predetermined operating delay time; a data strobe terminal supplied with a first data strobe signal from outside; a strobe signal generation circuit adding the predetermined operating delay time to the first data strobe signal to generate a second data strobe signal; and a skew detection circuit measuring a skew between the third clock signal and the second data strobe signal.

Disclosed are a delay-locked loop circuit and a semiconductor integrated circuit device of reduced power consumption, the delay-locked loop circuit having a tCK/2 generating DLL and an input/output-compensating DLL. The tCK/2 generating DLL includes first and second delay lines for delaying a frequency-divided clock input thereto from a frequency dividing circuit; a first phase detector for detecting the phase difference between the frequency-divided clock and the output of the second delay line; and a counter for outputting a signal that changes over the output taps of the first and second delay lines depending upon an output from the first phase detector. The input/output-compensating DLL includes third and fourth delay lines for delaying the frequency-divided clock input thereto; a multiplexer, to which output signals from the third and fourth delay lines are input, for outputting a signal in which timings of rising and falling edges are decided by rising edges of respective ones of the output signals and then by falling edges of respective ones of the output signals; a dummy multiplexer to which this output signal is input and having a delay time identical with that of a multiplexer that selects data; a dummy first buffer having a delay time identical with that of an output buffer; a dummy second buffer having a delay time identical with that of an input buffer; a second phase detector for detecting the phase difference between an output clock from the input buffer and the output of the dummy second buffer; and a counter for outputting a signal that changes over the output taps of the third and fourth delay lines depending upon an output from the second phase detector.

The invention discloses a detection circuit of a resistance sensing array strengthening the voltage feedback. The detection circuit comprises two-dimensional resistance arrays sharing the same row line and the column line, row multiplexers, column multiplexers, a scanning controller and a feedback circuit. Physical sensitive resistors in the two-dimensional resistance arrays are distributed according to an M*N two-dimensional structure. The scanning controller outputs scanning control signals, and single selections of any resistor to be measured in a row multiplexer array and a column multiplexer array are controlled respectively. A feedback circuit is composed of an operation amplifier and a voltage division circuit. Resistors with specific values are selected and used as a resistor R1 and a resistor R2 in the voltage division circuit. R1:R2=Rr:RS, Rr shows a channel inner resistor of the row multiplexers, and RS shows a sampling resistor. Under the action of the feedback circuit and a corresponding connection manner, the voltages cross two ends of the adjacent columns of resistors in the row where the resistor to be measured is located can be limited to be equal, the interference of measuring on the measured resistor by the adjacent columns of resistors of the resistor to be measured and the inner resistors of the column multiplexer is effectively reduced.

This technology relates to an encoding device, an encoding method, and a program capable of improving audio quality and more efficiently encoding audio. A first high-frequency encoding circuit encodes a high-frequency range based on a low-frequency subband signal and a high-frequency subband signal and obtains a high-frequency code amount. A low-frequency encoding circuit encodes a low-frequency signal with a code amount determined by the high-frequency code amount and a low-frequency decoding circuit decodes the encoded low-frequency signal. A subband dividing circuit divides a decoded low-frequency signal obtained by decoding into decoded low-frequency subband signals of a plurality of subbands and a second high-frequency encoding circuit generates a high-frequency code string such that a code amount of the high-frequency code string for obtaining a high-frequency component is not larger than the high-frequency code amount based on the decoded low-frequency subband signals and the high-frequency subband signals. The present invention is applicable to the encoding device.

The invention discloses a device capable of automatically detecting general-purpose serial bus hosts or peripheral equipment. In the equipment provided with a USB interface, the device is coupled to external USB equipment through a VBUS pin and judges that the external USB equipment is a USB host or USB peripheral equipment according to the change of the voltage. The device comprises a voltage detection circuit and a voltage detection element, the voltage detection circuit is respectively coupled to the voltage detection element and the VBUS pin of the USB interface. The voltage detection circuit can be a voltage-dividing circuit, and the voltage of the voltage detection circuit can change with the external input signal of the VBUS pin of the USB interface. The voltage detection element is used to detect the voltage change of the voltage detection circuit to judge that the external equipment connected with the voltage detection circuit is one USB host or USB peripheral equipment. With the invention, whether the external equipment is the USB host or the USB peripheral equipment is judged independent of the ID pin; at the same time, the power supply conflict can not be produced.

A power voltage of a power source circuit is produced by amplifying a threshold voltage difference of an operational amplifier by an amplification factor corresponding to a dividing ratio of a resistance dividing circuit. The power source circuit is integrated on a CMOS substrate together with a computer block. A plurality of analog switches are associated with the resistance dividing circuit to stabilize the power voltage of the power source circuit. One of these switches is selectively closed to change the dividing ratio of the resistance dividing circuit in accordance with actuation data stored in a control register.

The invention discloses a customized earphone based on a 3D (three-dimensional) printing technology and a manufacturing method of the customized earphone. The earphone comprises an earphone shell, a hard sound induction tube, a unit clamping groove, a sounding unit, a sound outlet connection device, a frequency dividing circuit, a seal cover and a wire socket; the earphone shell, the unit clamping groove, the hard sound induction tube and the seal cover are formed by a 3D printer in a printing manner; the frequency dividing circuit is connected with the sounding unit and the wire socket; the sounding unit is arranged in the unit clamping groove; the sounding unit is communicated with the hard sound induction tube through the sound outlet connection device; the seal cover is used for sealing the earphone shell to form the customized earphone. The thickness, internal structure, mechanical characteristics and acoustics characteristics of the customized earphone shell can be precisely controlled, the sound induction tube material can be optimized, the limitation on a soft material can be broken through, the labor and time cost can be greatly reduced, and the yield of the customized earphone can be greatly increased.

The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled battery 1 by connecting an output of a positive electrode resistance voltage dividing circuit composed of resistors 9 and 10 to + input of a differential amplifier 20 and connecting an output of a negative electrode resistance voltage dividing circuit composed of resistors 12 and 11 to − input of the amplifier 20, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifier 20 and connecting + input of the amplifier 20 to the minus input of the differential amplifier 20 to measure an output voltage of the amplifier 20. The total voltage detection and the leak detection can be performed without requiring an insulation type voltage sensor, an insulation power source, photo-couplers, or the like.

A power supply generating circuit, a display apparatus incorporating the same, and a portable terminal device using the display apparatus as an output display unit are provided. In a DC-DC converter having a charge pump circuit (31), a voltage dividing circuit (32), and a regulation circuit (33), p-channel MOS transistors (Qp21, Qp22, Qp31) are turned on/off based on an enable pulse enb to make the voltage dividing circuit (32) and a comparator (41) active only for a period of regulation time and inactive otherwise. This can cause a current to flow in voltage-divider resistors (R1, R2) and the comparator (41) only for a certain period of time required for the regulation operation, thus reducing the power consumption loss caused by a constant current flow in the voltage-divider resistors (R1, R2) and the comparator (41).

An electric leakage detecting apparatus, in an electric leakage detecting apparatus which is insulated from a chassis ground and detects electric leakages of a battery, is provided with: a voltage dividing circuit that divides an output voltage of the battery; an electric leakage determining circuit provided at a rear stage of the voltage dividing circuit, that determines the presence of an electric leakage based on a voltage detected by a circuit that respectively connects to a positive electrode side insulation resistance or a negative electrode side insulation resistance of the battery; and a dark current inhibit circuit in which a switch and a resistance are connected in parallel, that is inserted between at least either one of wiring that connects a positive terminal of the battery and the voltage dividing circuit, and wiring that connects a negative terminal of the battery and the voltage dividing circuit.

Disclosed is a charging machine including a main charging circuit and a charging control circuit, the main charging circuit comprises a filter circuit, a rectifier filter circuit, a pulse bleeder circuit, a half-bridge inversion circuit, a drive control circuit and a high frequency rectifier charging circuit, the charging control circuit comprises a power supply circuit, a voltage stabilizing circuit, a self-recycle circuit, a current detecting circuit, a voltage detecting circuit and a temperature detecting circuit, and the charging control circuit also comprises a control display circuit and a pulse modulation switching power supply integrating control circuit. The charging machine can effectively release the sulfation phenomenon of a battery plate by controlling a single chip microcomputer in the control display circuit to adopt multi-stage pulse type charging method, fives stages including constant current, constant voltage, floating charge I, average charge and floating charge II. Each stage in process outputs different duty cycle pulsing signal through the control of single chip microcomputer and then a half-bridge power tube is controlled to reach intermittent pulse current charge and depolarization effect.

A PLL circuit includes a phase comparator; a charge pump; a loop filter; a voltage-controlled oscillator; a frequency dividing circuit; an A counter for dividing the P-frequency-divided output; circuits for generating two signals, which have a phase difference equivalent to one period of the P-frequency-divided output of the frequency dividing circuit; and an interpolator for producing an output signal obtained by interpolating the phase difference between the two signals in accordance with an interior division ratio. The interpolator interpolates in steps of a value obtained by dividing the phase difference by P and incrementing or decrementing a value B, which decides an interior division ratio B:P-B, by B whenever frequency-division by A is performed, and a control circuit. The phase of the output of the interpolator is fed to the phase comparator and compared with the phase of a reference clock, and divides by a frequency-dividing factor.

The invention discloses a switching voltage stabilization circuit and a voltage feedback circuit as well as a voltage feedback method of the voltage feedback circuit. The switching voltage stabilization circuit comprises a switching circuit for converting input voltage into output voltage and output current; the voltage feedback circuit comprises a resistance voltage sharing circuit for sampling the output voltage, a line loss detection circuit and a controlled current source circuit; a compensation control signal is supplied to the output end of the line loss detection circuit and is in direct proportion to the output current; the controlled current source circuit is provided with a control end, a grounding end and an output end; the control end is coupled to the output end of the line loss detection circuit and receives the compensation control signal; the grounding end is grounded; the output end supplies compensation current; and the output end of the resistance voltage sharing circuit is connected with the output end of the controlled current source circuit to supply feedback voltage which represents backward output voltage.

The invention discloses a system for automatically testing the parameters of a quartz crystal oscillator, which comprises a master computer and a parameter test card connected with the main board of the master computer, wherein the parameter test card comprises a singlechip and a test circuit and a reference circuit which are connected with the singlechip respectively. The singlechip has a D/A module, an A/D module, a first counter, a second counter and a timer. The test circuit comprises a current amplification circuit, a voltage sampling resistor, a frequency dividing circuit, a first measurement gate control circuit and the crystal oscillator to be measured. The reference circuit comprises a reference frequency source, a frequency multiplication circuit, a second measurement gate control circuit and a frequency dividing and high-frequency signal latch circuit. In the invention, the test card integrates the functions of all apparatuses such as a frequency counter, a digital voltmeter and a digital oscillometer and can be directly inserted in the main board of the computer, and the fully automatic test of various parameters, such as working frequency, working current and start up time, of the quartz crystal oscillator can be realized by a control program.