CN1684010B - Receiver circuit for radio clock and method for operating receiving circuit - Google Patents
Receiver circuit for radio clock and method for operating receiving circuit Download PDFInfo
- Publication number
- CN1684010B CN1684010B CN2004101006321A CN200410100632A CN1684010B CN 1684010 B CN1684010 B CN 1684010B CN 2004101006321 A CN2004101006321 A CN 2004101006321A CN 200410100632 A CN200410100632 A CN 200410100632A CN 1684010 B CN1684010 B CN 1684010B
- Authority
- CN
- China
- Prior art keywords
- timing signal
- amplifier
- receiving circuit
- enlargement factor
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/08—Setting the time according to the time information carried or implied by the radio signal the radio signal being broadcast from a long-wave call sign, e.g. DCF77, JJY40, JJY60, MSF60 or WWVB
- G04R20/10—Tuning or receiving; Circuits therefor
Abstract
The invention relates to a wireless clock receiving circuit for receiving timing signals which are emitted by different timing signal emitters and includes encoded time information. The invention comprises an amplifying circuit for amplifying the received timing signals, wherein, the amplifying circuit is provided with a first amplifier whose amplification times can be adjusted according to the frequency of the received timing signals. The invention also relates to a method for obtaining time information from the emitted timing signals through the receiving circuit and a wireless clock having the receiving circuit.
Description
Technical field
The present invention relates to be used to receive the radio clock receiving circuit that sends by the different time scales sender unit, comprising the timing signal of temporal information with coding form; It has an amplifying circuit that is used to amplify received timing signal, and has one and be used for received timing signal is carried out filter circuit for filtering.The invention still further relates to by this receiving circuit and obtain the method for temporal information by the timing signal that is sent out and have the radio clock of this receiving circuit.
Background technology
Transmission radio controlled, temporal information realizes by so-called timing signal (Zeitzeichensignale), and these timing signals are by corresponding transmitter-be designated hereinafter simply as timing signal transmitter (Zeitzeichensender) to send.A timing signal is interpreted as the transmission signal of a short duration, and the task of giving it is the reference time that transmission is provided by a transmitter.It relates to the modulating oscillation that has a plurality of time marks usually in the case, and time mark only is demodulated into a pulse, and this pulse is reproduced the reference time of being sent with certain inaccuracy.
Germany long wave transmitting station DCF-77 receives atomic clock control and sends amplitude modulation long wave time signal according to the atomic time tolerance MEZ of official with 50KW power continuous firing ground on the 77.5KHz frequency.In other country, for example in Britain, Japan, there are similar transmitter in the China and the U.S., and they are in the temporal information of sending on the scope between 40KHz and the 120KHz on the long wave frequency.
Fig. 1 represent with mark A indication, under the situation of German timing signal transmitter DCF-77 the code pattern (telegram) of code time information.This code pattern is formed by 59 now, wherein per 1 corresponding to time frame 1 second.Therefore in 1 minute process, can transmit a so-called timing signal telegram (Zeitzeichen-Telegramm), it especially comprises the information of time and date with the binary coding form.First 15 B comprise general coding, and for example they comprise job information.Next 5 C comprise general information.For example R representes the antenna position; A1 representes to transmit the advance notice position in middle Europe time (MEZ) when being transformed into the middle Europe daylight-saving time (MESZ) and returning routine; Z1, Z2 represent position zone time, the start bit of the temporal information that advance notice position that A2 representes to change second and S represent to be encoded.From the 21st to the 59th with binary-coded decimal delivery time and date and time information, wherein these data also be applicable to its back minute.In the case in the region D the position comprise about minute information; In the area E the position comprise about hour information; Position among the F of zone comprises the information about the calendar day; The position of zone among the G comprises the information about Sunday, and the position among the regional H comprises about the information of the moon and the position in the area I and comprises the information about the calendar year.These information occur with coding form bit by bit.In region D, each end of E and I is provided with so-called check bit P1, P2, P3.The 60th in telegram is not occupied and be used to indicate the beginning of next time frame.M representes minute mark and indicates the beginning of timing signal telegram thus.
Structure and bit stealing that being used to shown in Fig. 1 sent the code pattern of timing signal are the general known articles " temporal information and standard frequency " that for example is described in Peter Hetzel that reaches, and Telekom Praxis is in the first volumes in 1993.
The transmission of timing signal information realizes by the which amplitude modulation of each second mark.This modulation is by the decline X1 of carrier signal X when each second begins; X2 (or rising) forms; Wherein under the situation of the timing signal of sending by the DCF-77 transmitter, when per second begins-the 59th second of per minute except-carrier amplitude drops to about 25% of amplitude for the X1 of 0.1 second duration or for the X2 of 0.2 second duration.The decline X1 of these various durations, X2 have confirmed each second mark or the data bit of decoded form.The various durations of second mark is used for the binary coding on watch time and date, wherein have 0.1 second duration second mark X1 corresponding to binary zero and have 0.2 second duration second mark X2 corresponding to binary one.Through next minute mark of vacancy mark advance notice in the 60th second.Combine then can realize evaluation by the temporal information of timing signal transmitter transmission with corresponding second.Fig. 2 representes a section of the timing signal of this which amplitude modulation by an example.
For radio clock and be used to receive the background of the receiving circuit of timing signal can be with reference to DE 198 08 431 A1, DE 43 19 946 A1, DE 43 04 321 C2, DE 42 37 112A1 and DE 42 33 126 A1.For obtaining by the temporal information of timing signal and the information processing of time information can be with reference to DE 195 14 031 C2, DE 37 33 965 C2 and EP 042 913B1.
The timing signal transmitter of selling now is designed to the single receive frequency of a timing signal that is sent out usually and also only is used for the decoding of the timing signal of this timing signal transmitter transmission thus.But current at its frequency convertible wireless electroclock table of exploitation and be used for the receiving circuit of this radio clock, so they should be designed to receive the timing signal of different time scales sender unit.These radio clocks also must receive the timing signal in the frequency range between the 40KHz-120KHz simultaneously.Therefore for the reception of timing signal, amplify, new problem has appearred in decoding and evaluation.
A low frequency, for example the carrier amplitude of the timing signal in the 40KHz scope has after the reception than the smaller signal amplitude of situation in timing signal higher-frequency, in the for example 60KHz-77.5KHz scope usually.Received timing signal is amplified by an amplifier that is located in the receiving circuit after reception.But the problem here is; This amplifier has a constant enlargement factor and reaches so long as received timing signal always is exaggerated with identical enlargement factor, and not to be noted: this timing signal has the timing signal of low signal amplitude or has the timing signal of high signal amplitude.Especially comparer can not inerrably detect a second mark sometimes under the situation of the timing signal with low signal amplitude ,-particularly when the markers signal has been applied undesired signal.The sensitivity of receiving circuit and decoding device reduces in the case.Go wrong during thus in decoding and also at evaluation.
In order to improve sensitivity, especially for the low frequency timing signal, there is a kind of possibility, promptly the enlargement factor of the amplifier of receiving circuit designs and designs based on " worst case " thus based on the low-limit frequency of an expection transmission timing signal.Its direct result is that the low frequency timing signal that is sent out is sufficiently amplified, so that decoding device and evaluation device have required enough sensitivity, so that inerrably decode and evaluation.But the problem here is that the timing signal with higher transmission frequency also is exaggerated simultaneously.And it is just much of that fully to this with lower enlargement factor.
On existing receiving circuit, paid cost, had low timing signal of sending frequency so that also can enough receive reliably for this higher amplification coefficient.But this has paid the cost of amplifying circuit high power loss, because bigger amplifier current must be provided, this has just directly caused high power absorption.Especially for have localpower, like the application of the radio clock of battery or accumulator, this absorbed power and thus its energy consumption be an extremely important index.In said system, should will cause based on the design of " worst case ": battery only has little serviceable life or accumulator must be recharged soon.
Summary of the invention
Task of the present invention is, makes receiving sensitivity and transmission frequency irrelevant as best one can.Especially the transmission frequency-independent ground of the timing signal of receiving circuit and transmission has receiving sensitivity much at one.Particularly, this receiving sensitivity should be sufficiently high, so as to make received timing signal in sending the whole frequency range of frequency with enough reliabilities decoded and evaluation, and can not cause higher power absorption and can not cause higher energy consumption thus.
According to the present invention; Proposition is used for the receiving circuit of radio clock; That this receiving circuit is used to receive is that some are sent by the different time scales sender unit, comprising the timing signal of temporal information with coding form, and this receiving circuit has at least one amplifying circuit that is used to amplify this received timing signal, wherein; This amplifying circuit has one first amplifier, and it is constituted as its enlargement factor and can regulates according to the frequency of this received timing signal.
According to the present invention; Proposition is obtained the method for temporal information by the timing signal that is sent out; Wherein be provided with one according to receiving circuit of the present invention in order to receive these timing signals that are sent out; It has at least one amplifier, and wherein the enlargement factor of at least one amplifier of this receiving circuit is regulated according to the transmission frequency of received timing signal.
According to the present invention; Proposition is used for being obtained by the timing signal that is sent out the radio clock of temporal information; Especially by obtaining temporal information according to the method for the invention; Have one according to receiving circuit of the present invention, this receiving circuit has at least one antenna circuit that is used to receive these timing signals that are sent out; Have a decoding and an evaluation device that is connected this receiving circuit back, be used for the timing signal that is received by receiving circuit is decoded and evaluation.
Design as the present invention basis is, when receiving the timing signal of different time scales sender unit, in the receiver of radio clock or radio clock itself, will prepare at least one adjustable amplifier.According to the present invention, the enlargement factor of this amplifier can be based on sending frequency adjustment.With predetermined regularly enlargement factor-as known radio clock receiving circuit had-different ground, be configured now according to receiving circuit of the present invention and have variable, adjustable enlargement factor.Therefore the enlargement factor of amplifier can adapt to the transmission frequency of the timing signal that is sent out best.Especially this enlargement factor can be made the transmission frequency-independent ground of receiving circuit and rearmounted decoding and evaluation device and reception have almost constant receiving sensitivity by such adjusting now.This make received, especially decoding and the evaluation with the temporal information of the timing signal of low relatively transmission frequency emission becomes easy.
Send frequency ground through the enlargement factor best-fit and regulate, also make required power absorption of amplification and required thus energy consumption be able to optimize.
Because the logical structure of the band that the receiver design must keep, the more high-frequency timing signal of timing signal that requires lower frequency usually is by decay strongly.By installing in a circuit according to the invention, a plurality of convertible selecting arrangements with the logical limited characteristic of band are provided, they can be switched on through control device.These convertible selecting arrangements are constituted in this wise, and promptly they carry out estimating to the difference of the enlargement factor of the corresponding receiving position (Empfangsstelle) of receiving circuit differently and according to this enlargement factor the enlargement factor of each selecteed receiving position are raise or reduction.In this way, can realize required, constant as far as possible sensitivity for the different different receiving positions that send frequency for configuration.
For receiving circuit according to the present invention importantly, the transmission frequency that reaches the timing signal that is received by receiver that is sent out is known.The device of the automatic identification of the transmission frequency of a timing signal that is used to be sent out for this reason, arranged according to the present invention.
This device that is used to send Automatic Frequency identification has one and is provided with a regulating device, it regulates this amplifier again when the timing signal that is exaggerated departs from the signal level of being expected enlargement factor.Enlargement factor is regulated again in the case, till no longer having deviation always.Because the value scope of regulating again for each transmission frequency is known, then can go out the transmission frequency of current existence by the value region estimation of regulating again.
The configuration of a modification is to be provided with control and evaluation device, and it is analyzed the timing signal of amplifying.This timing signal produces with corresponding, the preregulated regulated value of known transmission frequency by one of amplifier.Be used for discerning automatically the direct now value scope that departs from by the relative optimum signal value of expecting of the device that sends frequency and derive the transmission frequency.
In another same favourable configuration, this device is directly tried to achieve the transmission frequency by the timing signal that is sent out.Here the timing signal that is sent out is sampled and evaluation in order to try to achieve the transmission frequency.This evaluation realizes through a simple counter that usually it is through trying to achieve the frequency of the timing signal that is sent out to the counting of sampled value.
One to configuration this conversion, particularly advantageous in, be provided with an automatically device of the agreement of the received timing signal of identification, it tries to achieve the transmission frequency by the coding of timing signal.This configuration according to the present invention is based on the recognition: the coding of a timing signal can reflect the characteristic of the different timing signal transmitter that sends timing signal.For example German timing signal transmitter DCF-77 accurately send two different second marks, the decline duration in these seconds marks is 100ms or 200ms.Therewith differently, Britain timing signal transmitter MSF also accurately sends two different second marks, but their duration are 100ms or 500ms.It is 100ms that U.S. transmitter WWVB sends three different, duration altogether, the second mark of 500ms and 800ms.Though that Japan's timing signal transmitter also sends is identical with the decline duration of U.S. transmitter WWVB, promptly 100; 500, three different second marks of 800ms, but the second mark here is inverted; In other words, sloping portion is positioned at the not end of corresponding time frame.Similarly, the agreement of other timing signal transmitter has these unique codings too.
If a respective coding disposes to a timing signal transmitter, the transmission frequency that then reflects this transmitter characteristic also is known.Therefore the known protocol deducibility by a timing signal that is sent out goes out corresponding transmission frequency, and regulates enlargement factor therewith relatively and conform with the destination thus and regulate receiving sensitivity.For the different agreement of each timing signal and send frequency thus accordingly and for example can be stored in the memory storage that aims at this setting.
In order to regulate the enlargement factor of receiving circuit or its amplifier, be provided with a control device.This control device produces a control signal according to known transmission frequency and controls regulated amplifier, is adjusted on the required enlargement factor so that its enlargement factor conforms with the destination.Especially in this wise regulate enlargement factor in the case, promptly be adjusted to a best as far as possible receiving sensitivity.
Preferably, this control device also comprises the device that is used for discerning automatically the agreement of received timing signal.
In a configuration of the present invention, be provided with a plurality of convertible selecting arrangements.The back that corresponding selecting arrangement is connected in parallel to each other in an advantageous manner and arranges and be connected adjustable amplifier.Each selecting arrangement can advantageously be configured the BPF. with very steep edge.This BPF. is configured narrow band filter and is tuned on as far as possible on the single transmission frequency.These are typically worked and in the logical frequency band of band, respectively form a low ohmic resistance in series resonance ground in the case as the selecting arrangement that quartz-crystal filter constitutes.Its resistance be high ohm beyond the logical frequency band of this band so that by the frequency component that decays very doughtily be allowed to through.Be suppressed at the frequency band interference in addition of this BPF. in this way.
Give the selecting arrangement that sends frequency in order only to start configuration, be provided with at least one controllable switch, it is connected the front of selecting arrangement.The switch that can use arbitrarily here, can correspondingly connect or insert through simple control signal is as gate-controlled switch.For example this gate-controlled switch can be a transistor, like MOSFETs, and bipolar transistor, JFETs, thyristor, IGBTs or similar device.
The control device that the generation control signal is regulated the enlargement factor of first amplifier also provides one to select signal at outgoing side; Also make a gate-controlled switch conducting through it, the selecting arrangement of this gate-controlled switch configuration is tuned on the respective transmit frequency of timing signal.Therefore other the selecting arrangement of its bandpass characteristics beyond this transmission frequency be not switched on.
In a favourable further configuration; The back of the parallel circuit of forming at adjustable amplifier or by the arrowband selecting arrangement is connected with a single BPF., and this BPF. forms the post-filtering device of the timing signal crossed of bandpass filtering in selecting arrangement to a certain extent.Therefore here carry out being amplified by the interchange of the timing signal of filtering (AC).And will being eliminated, but the DC component in the elimination timing signal thus by the direct current of the timing signal of filtering (DC) skew.The amplification of DC component possibly cause and is exaggerated and by the excessive skew of the timing signal of filtering.Therefore BPF. by postposition can carry out the inhibition that DC amplifies.Certainly also can consider, connect a BPF. special and this selecting arrangement matees at the back, replace single BPF. of each branch road use the parallel circuit of selecting arrangement at corresponding selecting arrangement.But this cost on circuit engineering is very high.
In a favourable configuration of the present invention, be provided with one second amplifier, it is set at the back of first amplifier.This second amplifier is used for being amplified by the postposition of the timing signal of bandpass filtering at selecting arrangement by reaching of first amplifier amplification.The use that is connected second amplifier of the first amplifier back is particularly advantageous from the reason of energy especially, because the required transverse current (
) of amplification can be distributed in the different amplifier stages.Therefore each size of component of these amplifier stages can be smaller, has total less power absorption and less energy consumption thus.
In a configuration, first and/or second amplifier is configured single-stage or multistage differential amplifier.But can consider also that here amplifier is configured operational amplifier, trsanscondutance amplifier (
) or similar amplifier.Each differential amplifier stage of amplifier can advantageously be controlled through the adjusting of emitter current.Enlargement factor is regulated like this, makes in amplifier controlled fundamental current and control signal relatively, differently change.This has determined the control signal of controlling each differential amplifier stage to cause different magnifications.
In a particularly advantageous configuration, only be that a level, the especially enlargement factor of its output stage of differential amplifier is adjustable.This has just satisfied provides an adjustable amplifier.
In a very favorable further configuration, adjustable amplifier has a basic enlargement factor, and the intermediate frequency that this basic enlargement factor is based in the frequency range of transmission frequency of timing signal of all timing signal transmitters designs.Therefore can be advantageously easy variation through this basic enlargement factor be adjusted on the transmission frequency of skew.
Control device can advantageously be realized through logical circuit, for example FPGA circuit or the formation PLD circuit of link.Though the function of control device can satisfy through the microcontroller that always is provided in a side of in the radio clock usually basically.But the advantageous particularly part according to scheme of the present invention is: can on circuit engineering, realize the adjusting of enlargement factor with very simple mode by this control device, and not necessarily will take microcontroller here.This microcontroller then can be used for other task now, the task that processing of for example disturbing in the decoding of timing signal and evaluation, the timing signal and user are special-purpose.
In order to confirm frequency and to regulate enlargement factor thus, at first received timing signal is analyzed.Automatically discern the agreement of the timing signal that is sent out by the timing signal of being analyzed.Be stored in correspondence table in the storer, that be used to send frequency and agreement-can identify the timing signal transmitter that sends this timing signal by the agreement of being discerned-for example by one.This transmitter that sends timing signal also can be additionally or conversion ground through sending frequency evaluation and confirm.Therefore that can derive by agreement or corresponding with current just received timing signal by the known transmission frequency of frequency evaluation.In case try to achieve the transmission frequency, its enlargement factor can automatically adapt to the transmission frequency of this timing signal transmitter, realizes the optimum reception sensitivity of receiver thus always.
The more high-frequency timing signal of timing signal of lower frequency will be amplified more doughtily.The notion of the timing signal of the timing signal of " lower frequency " and " upper frequency " relates to a frequency band, and timing signal transmitters different in this frequency band send its timing signal, promptly in the frequency range between 40KHz-120KHz.
Be preset with a basic enlargement factor for first amplifier; And this basic enlargement factor is designed in the situation on the intermediate frequency in the said frequency range; As long as the frequency of received timing signal is lower than this intermediate frequency, the enlargement factor of adjustable amplifier is enhanced on the enlargement factor more than the basic enlargement factor.On the contrary, as long as the frequency of received timing signal is higher than this intermediate frequency, the enlargement factor of adjustable amplifier is lowered on the enlargement factor below the basic enlargement factor.
In a further configuration, in order to regulate enlargement factor a control signal is provided, make at least one amplifier stage regulated continuously or control through this control signal with increasing continuously.Can conform with rising or decline that the destination produces amplifier current in this way.If improved amplifier current in this way, then obtain a higher enlargement factor always.Can realize lower enlargement factor on the contrary, as long as correspondingly descend through the amplifier current of this amplifier stage.
Temporal information is present in the timing signal bit by bit, and the value of one of them corresponding data position provides based on the corresponding telegram of timing signal transmitter, by duration of the change of the amplitude of the timing signal that is sent out.To (scale-of-two) value of each data bit configuration, this value was derived by the duration of this variation in the case.First duration of the change of the amplitude of timing signal is here represented first logical value and second duration of data bit second logical value corresponding to data bit.The telegram of this first and second duration through the timing signal transmitter is determined in advance.
Typically, first logical value is expressed as a logical zero (LOW, low voltage level) and second logical value is expressed as a logical one (HIGH, high-voltage level).Certainly also can consider it is opposite logic.
In the telegram of a timing signal of being sent by the timing signal transmitter, a change is typically expressed as the decline of the amplitude of timing signal.Certainly also can consider it is opposite logic here, i.e. the rising of binary coding through amplitude here realizes.
Description of drawings
Below specify the present invention by the embodiment that in the summary diagrammatic sketch of accompanying drawing, provides.Wherein accompanying drawing is:
Fig. 1: a code pattern (timing signal telegram) by the code time information of timing signal transmitter DCF-77 transmission;
Fig. 2: one that be sent out, have 5 second mark the segment of amplitude modulation timing signal;
Fig. 3: according to the circuit block diagram of first scheme of radio clock of the present invention, as to have adjustable enlargement factor;
Fig. 4: be used for overall pattern according to a receiving circuit of the present invention of the radio clock of Fig. 3;
Fig. 5: be used for radio clock, first embodiment with receiving circuit of adjustable enlargement factor of the present invention according to Fig. 3;
Fig. 6: be used for radio clock, the second special preferred embodiment with receiving circuit of adjustable enlargement factor of the present invention according to Fig. 3;
Fig. 7: according to the circuit block diagram of the alternative plan of radio clock of the present invention, as to have adjustable enlargement factor.
Identical label is explained-be equipped with to parts identical or that function is identical and signal-short of other in all figure of accompanying drawing.
Embodiment
Fig. 3 expresses first scheme of radio clock of the present invention, as to have adjustable enlargement factor through a circuit block diagram.
Radio clock by label 1 expression has (or a plurality of) antenna 2, is used to receive the timing signal X that is sent by timing signal transmitter 3.Radio clock 1 also has a receiving circuit 4, is used to receive the timing signal X that is sent and received by antenna 2 by timing signal transmitter 3, and the input end of this receiving circuit is connected with antenna 2.Receiving circuit 4 typically comprises one or more wave filters, for example BPF., and a detecting circuit and an amplifying circuit are used for received timing signal X is carried out filtering, detection and amplification.A kind of like this structure and function of receiving circuit 4 are below especially described by Fig. 4 to 6 in more detail.
Be provided with a decoding device 5 in addition, it be connected the back of receiving circuit 4 and be used for to be received, the timing signal X ' of detection and amplification decodes.Be connected with evaluation device 6 in the back of decoding device 5, this evaluation device calculates an accurate watch time and an accurate date by the decoded data bit of timing signal X '.Watch time and date by such calculating produce a watch time and the signal on date 7.Decoding device 5 and control device 12 are ingredients of a presetting apparatus 14 in the present embodiment, and this presetting apparatus also can be the ingredient of receiving circuit.Typically be provided with a microcontroller as presetting apparatus 14, it for example is constituted as 4 level controllers under the situation of radio clock 1.
This radio clock also has an electronic watch 8, and the latter's watch time is controlled by clock and watch quartz (controlled) oscillator 9.This electronic watch 8 and an indicating device 10, for example a display is connected, through its indication watch time.Now clock and watch 8 are gone back input signal 7, clock and watch 8 are correspondingly proofreaied and correct the indicated time according to this signal.
According to the present invention, receiving circuit 4 has at least one adjustable amplifier 11.For control amplifier 11 reaches the enlargement factor of regulating it thus, be provided with a control device 12.Control device 12 also additionally is designed to: with control signal corresponding 13 " control decoding device 5 and evaluation device 6.
Predetermined control signal of control device 12 usefulness 13 is controlled receiving circuits 4 in the case.According to the amplifier 11 of receiving circuit 4 and the adjusting of filter unit, this receiving circuit 4 produces one at outgoing side and is exaggerated and in case of necessity by the timing signal X ' of filtering.This timing signal X ' is imported into the input end of control device 12.
For the accurate adjusting of adjustable amplifier 11 or filter unit, importantly know exactly to be sent out and the transmission frequency f of received timing signal X.Only the enlargement factor of amplifier 11 or filter unit just can correspondingly be regulated through control signal 13 best under the situation of known transmission frequency f.The transmission frequency f fixes on really in the control device 12 and is done as follows:
Different agreement by the timing signal of different timing signal transmitter emission is known.These agreements for example can be stored in the control device 12 interior specially memory storages 18 to this setting.Can consider that the storage of different agreement data for example is the form (look-up table) of form.Therefore the transmission frequency f that belongs to corresponding timing signal transmitter also is known, and they can be stored in the memory storage 18 equally.Exist one for each such transmitter frequency f and be used for optimum adjustment this transmission frequency f, enlargement factor and filter unit.And the special-purpose regulated value of this transmission frequency also can preferably be stored in the memory storage 18.
In order to confirm the transmission frequency f of a current timing signal X who is being sent out, the unit that makes the unit of receiving circuit 4, especially regulated amplifier 11 according to first method by preconditioning on a known regulated value or enlargement factor.When the timing signal X ' that amplifies had departed from the signal level of, expection corresponding with the transmission frequency f of confirming, amplifier 11 was regulated always again, up to bias free or only there is very little deviation to exist.Control device 12 also is provided with a regulating circuit for this reason.Because it is known sending the corresponding regulated value again of frequency f for each, therefore available very simple mode is inferred current transmission frequency f.
In the method for a transmission frequency f conversion, that be used for confirming a current timing signal X who is being sent out, amplifier 11 is by on preconditioning to one and corresponding, the optimal enlargement factor regulated value of definite transmission frequency f.Then make the timing signal X ' that obtains thus, amplify in control device 12 by evaluation.If this evaluation obtain one with excessive the departing from of optimum signal value by the expectation of this regulated value, then deducibility goes out: the current transmission frequency f and the agreement of received timing signal are inconsistent, and this timing signal is used for the preconditioning of amplifier 11.In this case, sending frequency f must be verified always, up to the timing signal X ' that amplifies with by the optimum signal value of regulated value expection depart from for minimum and thus (more or less exactly) identify correct transmission frequency f.
Though control device 12 is as the ingredient of radio clock 1 in Fig. 3, as the ingredient of receiving circuit 4, not self-evident, at least a portion function of control device 12 also can realize in receiving circuit 4.
Fig. 4 representes to be used for the overall pattern according to a receiving circuit 4 of the present invention of the radio clock of Fig. 3.
Receiving circuit 4 has an input end 15 and an output terminal 16.Input end 15 is coupled with antenna circuit 2.Receiving circuit 4 has an amplifier 11 and series connection BPF. 17 thereafter, and the latter's outgoing side is connected with output terminal 16.According to the present invention, the enlargement factor of amplifier 11 is adjustable, and is represented as the crosscut arrow.This amplifier 11 can constitute one or more levels.At least one of them amplifier stage is adjustable under the situation of polystage amplifier 11.BPF. 17 can be regulated through control signal 13 ' in the present embodiment.Here " scalable " means: the frequency range of BPF. 17 is adjustable.
Fig. 5 representes first embodiment according to receiving circuit of the present invention, as to have the scalable enlargement factor.This receiving circuit 4 has first amplifier 11, and its enlargement factor is adjustable, and its input side is connected with antenna circuit 2, and connects first adjustable BPF. 17 behind the outgoing side.Connecting second amplifier 36 in the back of first BPF. 17, it plays post amplifier.
Here first amplifier 11 constitutes resonance-amplifier.This amplifier 11 has second BPF. 20 at input side, and the latter is connected with input end 2.Connecting first amplifier stage 21 in the back of second BPF. 20.The back of this amplifier stage 21 is connecting the parallel circuit of being made up of three amplifier branch road 22-24.Each of these amplifier branch roads 22-24 respectively comprises by a gate-controlled switch 25-27, second an amplifier stage 28-30 and the series circuit that quartz-crystal filter 31-33 forms.These gate-controlled switches 25-27 and these second amplifier stages 28-30 are the ingredient of first amplifier 11, and these quartz-crystal filters 31-33 then is the ingredient of adjustable BPF. 17.
Use control signal 21a in the present embodiment, 28a-30a is to all amplifier stages 21, and 28-30 controls, and makes according to these control signals 21a, and 28a-30a is at corresponding amplifier stage 21, and scalable goes out a required enlargement factor among the 28-30.And these gate-controlled switches 25-27 controls through control signal corresponding 25a-27a.
All control signal 21a, 28a-30a is provided by control device 12.This control device 12-is for example according to said method-the try to achieve respective transmit frequency f of timing signal X.At this moment regulate the enlargement factor of first amplifier 11 according to known transmission frequency f.For this purpose, start at least one among the branch road 22-24, especially definitely, start single branch road 22-24, its mode is the corresponding gate-controlled switch 25-27 of closed this branch road 22-24.Remaining switch 25-27 stays open.
In the present embodiment the hypothesis: gate-controlled switch 25 be closed and thus amplifier branch road 22 be activated.Then through control signal 21a, the control of the total magnification that 28a control amplifier stage 21,28 and realizing thus is made up of the single enlargement factor of two amplifier stages 21,28.
Quartz-crystal filter 31-33 is configured the selecting arrangement with the logical limited characteristic of band.Especially, each quartz-crystal filter 31-33 has a different frequency of passing through.For example, first quartz-crystal filter 31 has the frequency of passing through of 40KHz, second quartz-crystal filter 32 have 60KHz pass through frequency and the 3rd quartz-crystal filter 33 has the frequency of passing through of 77.5KHz.Usually through only making a connection among the gate-controlled switch 25-27, also obtain adjustable frequency of passing through of first BPF. 17 thus.
Fig. 6 representes the second special preferred embodiment according to receiving circuit 4 ' of the present invention, as to have adjustable enlargement factor.With the different ground of embodiment among Fig. 5, cancelled the amplifier stage 28-30 among the branch road 22-24 here.The function of these amplifier stages 28-30 will be satisfied by single amplifier 21.Amplifier 21 for example is a multistage differential amplifier.In order to regulate its enlargement factor, regulate the enlargement factor of at least one differential amplifier stage here.
Can consider conversely that also cancellation amplifier 21 and its function are realized by the amplifier stage 28-30 among the branch road 22-24 of Fig. 5.
Fig. 7 representes the circuit block diagram according to the alternative plan of radio clock 1 ' of the present invention, as to have adjustable enlargement factor.
With the different ground of first scheme according to the radio clock of Fig. 3, the input side of the control device 12 among Fig. 7 is connected with antenna 2, and this control device 12 also is transfused to received timing signal X thus.Control device 12 comprises a device 19, and this device 19 is directly tried to achieve the transmission frequency f of received timing signal X and controlled adjustable amplifier 11 by the control signal 13 that known like this transmission frequency f derives from the timing signal X that sends.
Though above invention has been described by preferred embodiment, the present invention is not limited on these embodiment, and can reach the method change in many ways.
The coding decline through carrier signal when a time frame begins always realizes in the above-described embodiments.Self-evident, this coding certainly also can through rise or at large the variation of the amplitude through carrier signal realize.
Provided a kind of receiving circuit in the above-described embodiments, wherein always first amplifier is adjustable.Self-evident, for the situation that is provided with a plurality of amplifiers and amplifier stage, in order to realize required enlargement factor, wherein arbitrarily amplifier or arbitrarily amplifier stage can be adjustable.
Even being appreciated that given physical circuit technical scheme also only is the possible embodiment of a receiving circuit, it can be very simply replacing through simple components or functional unit change.Especially, selected the simple especially circuit engineering scheme of a receiving circuit here wittingly.
Especially, the present invention is not limited on the above-mentioned numbers illustrated certainly, and they only provide as an example.And the present invention can be in the scope of professional's skill and knowledge changes with mode arbitrarily.
Described the preferred structure of a radio clock in the above-described embodiments, but the present invention is not limited above that.And the present invention be fit to arbitrarily, wherein to be used to amplify the amplifier of timing signal be can corresponding adjusting radio clock.
Radio clock also can be understood that such clock and watch in addition, and the transmission of timing signal is limited by lead (drahtgebunden) and realizes in these clock and watch, and is for example common in clock and watch equipment, but it has described structure.
Described in the above-described embodiments and be used for a plurality of methods and the device of identification transmission frequency automatically.Self-evident, here also can be additionally or conversion ground also use other, possibly same favourable being used to discern the method for sending frequency.
REFERENCE NUMBER LIST
The A code pattern
The general bits of coded of B
General date of C and clock time position
D minute position
E hour position
F calendar day position
G position on Sunday
H calendar month position
I calendar year position
M minute mark
R antenna position
A1, A2 predict the position
The S start bit
The P1-P3 check bit
Z1, Z2 position zone time
X, X ' timing signal
X1, X2 carrier signal, the sloping portion of second mark
The transmission frequency of the timing signal that f sends
1 radio clock
2 antennas, antenna circuit
3 timing signal transmitters
4 receiving circuits
5 decoding devices
6 evaluation devices
7 watch times and date signal
8 electronic watches
9 quartz (controlled) oscillators
10 indicating devices, display
11 regulated amplifiers
12 control device
13,13 ', 13 " control signal
14 presetting apparatus, microcontroller, microprocessor
15 (receiving circuit) input end
16 (receiving circuit) output terminal
17 adjustable BPF.s, selecting arrangement
18 memory storages, look-up table
19 send frequency-identification unit
20 BPF.s
21 amplifier stages, amplifier
The 21a control signal
22-24 amplifier branch road
The 25-27 gate-controlled switch, MOSFETs
The 25a-27a control signal
The 28-30 amplifier stage, amplifier
The 28a-30a control signal
The 31-33 quartz-crystal filter
34 BPF.s
35 amplifiers, amplifier stage
Claims (38)
1. the receiving circuit (4) that is used for radio clock (1); That this receiving circuit is used to receive is that some are sent by different time scales sender unit (3), comprising the timing signal (X) of temporal information with coding form; This receiving circuit has at least one amplifying circuit that is used for amplifying this received timing signal (X); It is characterized in that: this amplifying circuit has one first amplifier (11), and this first amplifier is constituted as its enlargement factor and can regulates according to the frequency (f) of this received timing signal (X).
2. according to the receiving circuit of claim 1, it is characterized in that: be provided with a device that is used for automatic frequency identification, it is designed to try to achieve the transmission frequency (f) of this received timing signal (X).
3. according to the receiving circuit of claim 2, it is characterized in that: be provided with a control device (12), it regulates the enlargement factor of this amplifier (11) always again, no longer has deviation up to timing signal that is exaggerated (X ') and the signal level of being expected; And this device (18) that is used for automatic frequency identification is derived transmission frequency (f) from the value scope of regulating again of enlargement factor.
4. according to the receiving circuit of claim 2; It is characterized in that: be provided with a control device (12); It is analyzed the timing signal of this amplification (X '); The timing signal of this amplification is produced by preregulated regulated value by of this amplifier, and it is corresponding with a known transmission frequency (f), and this device (18) that is used for automatic frequency identification is directly derived this transmission frequency (f) from value scope that the relative optimum signal value of expecting departs from.
5. according to the receiving circuit of claim 2, it is characterized in that: this device (18) that is used for automatic frequency identification is designed to try to achieve transmission frequency (f) by the agreement of this received timing signal (X).
6. according to one receiving circuit in the above claim; It is characterized in that: be provided with a control device (12) that is connected with this first amplifier (11); Transmission frequency (f) that it is tried to achieve according to one, this received timing signal (X) produces a control signal (13), with the enlargement factor of controlling this first amplifier (11) and regulating it.
7. according to one receiving circuit in the claim 1 to 5; It is characterized in that: be provided with a plurality of convertible selecting arrangements with the logical limited features of band; Their each layouts that is connected in parallel to each other, and their back and each of being connected this first amplifier (11) by be tuned on the transmission frequency (f) of different timing signal (X).
8. according to the receiving circuit of claim 7, it is characterized in that: at least one selecting arrangement has the quartz-crystal filter (31-33) of an arrowband.
9. according to Claim 8 receiving circuit, it is characterized in that: be provided with at least one gate-controlled switch (25-27), it is connected with a selecting arrangement.
10. according to the receiving circuit of claim 9; It is characterized in that: this control device (12) is connected with the control terminal of said gate-controlled switch (25-27); And send one of frequency (f) generation according to this and select signal (25a-27a); Can control said gate-controlled switch (25-27) through this selection signal, so that at least one gate-controlled switch (25-27) is inserted with corresponding selecting arrangement.
11. according to one receiving circuit in the claim 1 to 5; It is characterized in that: be connected with a unique BPF. (34) in the back of this first amplifier (11), be used to suppress the skew that direct current (DC) amplifies and/or eliminate this timing signal that is exaggerated (X).
12. according to one receiving circuit in the claim 1 to 5; It is characterized in that: this amplifying circuit has one second amplifier (36); It is set at the back of this first amplifier (11), and timing signal (X) postposition that it is used for being exaggerated at first amplifier (11) is amplified.
13. according to one receiving circuit in the claim 1 to 5, it is characterized in that: said first amplifier (11) is configured single-stage or multistage differential amplifier.
14. the receiving circuit according to claim 12 is characterized in that: said first and/or second amplifier (11,36) is configured single-stage or multistage differential amplifier.
15. according to one receiving circuit in the claim 1 to 5, it is characterized in that: the enlargement factor that only is a level of this amplifying circuit is adjustable.
16. according to one receiving circuit in the claim 1 to 5; It is characterized in that: this amplifying circuit has a basic enlargement factor, and this basic enlargement factor is based on the intermediate frequency in the frequency range of transmission frequency (f) of all timing signals that are sent out (X) and designs.
17. the receiving circuit according to claim 3 or 4 is characterized in that: this control device (12) is configured the logical circuit of link.
18. the receiving circuit according to claim 9 is characterized in that: said at least one gate-controlled switch is a transistor.
19. the receiving circuit according to claim 15 is characterized in that: a level of this amplifying circuit is an output stage.
20. receiving circuit according to claim 16; It is characterized in that: this first amplifier (11) has a basic enlargement factor, and this basic enlargement factor is based on the intermediate frequency in the frequency range of transmission frequency (f) of all timing signals that are sent out (X) and designs.
21. the receiving circuit according to claim 3 or 4 is characterized in that: this control device (12) is configured the FPGA circuit or constitutes the PLD circuit.
22. obtain the method for temporal information by the timing signal that is sent out (X); Wherein be provided with one and have at least one amplifier (11 in order to receive these timing signals that are sent out (X); 36) receiving circuit (4); It is characterized in that: the enlargement factor of at least one amplifier (11,36) of this receiving circuit (4) is regulated according to the transmission frequency (f) of received timing signal (X).
23. the method according to claim 22 is characterized in that, has following method step:
(a1) this amplifier (11) by preconditioning on a predetermined enlargement factor;
(b1) amplify this received timing signal (X) with this preregulated enlargement factor;
The timing signal that (c1) is exaggerated (X ') to be regulated again always, there is not deviation in the signal level of being expected up to relative this preregulated enlargement factor of basis;
(d1) by the height of this deviation and/or the value scope of regulating again confirm the transmission frequency (f) of this received timing signal (X).
24. the method according to claim 22 is characterized in that, has following method step:
(a2) make this amplifier (11) by preconditioning one predetermined, with one first send on the corresponding enlargement factor of frequency;
(b2) with this preregulated enlargement factor this received timing signal (X) is amplified and evaluation;
(c2) predetermined first send frequency repeating step (a2)-(b2) with another, up to the value of obtaining so received timing signal (X), promptly this timing signal that is exaggerated (X ') relatively should be minimum through the deviation of regulating the optimum signal value of being expected;
(d2) with current, just with its transmission frequency (f) configuration that comes the preconditioning regulated amplifier to this timing signal that is sent out (X).
25. the method according to claim 22 is characterized in that, has following method step:
(a3) this received timing signal (X) is analyzed;
(b3) automatically discern the agreement of the timing signal (X) that is sent out and discern the timing signal transmitter (3) that sends this timing signal (X) thus by this timing signal of being analyzed (X);
(c3) give the timing signal (X) that is sent out with transmission frequency (f) configuration of this timing signal transmitter (3).
26. according to one method in the claim 22 to 25, it is characterized in that: said enlargement factor is automatically coordinated with this transmission frequency (f) mutually.
27. the method according to claim 25 is characterized in that: the agreement of automatically discerning this timing signal that is sent out (X) by the transmission frequency (f) of this timing signal (X) and/or coding.
28. according to one method in the claim 22 to 25, it is characterized in that: in order to try to achieve this transmission frequency (f), this received timing signal (X) is sampled or evaluation, wherein this transmission frequency (f) is through being tried to achieve by the counting of sampled value.
29. according to one method in the claim 22 to 25, it is characterized in that: the timing signal of a lower frequency (X) is amplified than the timing signal (X) of a upper frequency more doughtily.
30. according to one method in the claim 22 to 25; It is characterized in that: this amplifier (11; 36) have a basic enlargement factor, the interior intermediate frequency of frequency range that this basic enlargement factor is based on the transmission frequency (f) of all timing signals (X) designs; And when the transmission frequency (f) of this received timing signal (X) was lower than this intermediate frequency, the enlargement factor of this amplifier (11,36) was enhanced on this enlargement factor more than basic enlargement factor.
31. according to one method in the claim 22 to 25; It is characterized in that: this amplifier (11; 36) have a basic enlargement factor, the interior intermediate frequency of frequency range that this basic enlargement factor is based on the transmission frequency (f) of all timing signals (X) designs; And when the transmission frequency (f) of this received timing signal (X) was higher than this intermediate frequency, the enlargement factor of this amplifier (11,36) was lowered on the enlargement factor below this basic enlargement factor.
32., it is characterized in that:, a control signal (13 is provided in order to regulate this enlargement factor according to one method in the claim 22 to 25; 21a 28a-30a), makes at least one amplifier stage regulated continuously or control through this control signal with increasing continuously.
33. according to one method in the claim 22 to 25; It is characterized in that: each timing signal (X) is made up of the time frame of a plurality of constant duration (T); Wherein temporal information is present in this timing signal (X) bit by bit and wherein each time frame is distributed at least one data bit; Wherein the value of corresponding data position is by a change (X1 of the amplitude of this timing signal (X); X2) duration confirms that wherein one first duration of the change (X1) of the amplitude of this timing signal (X) reaches one second logical value of one second duration of this change (X2) corresponding to this data bit corresponding to one first logical value of this data bit.
34. the method according to claim 33 is characterized in that: this first logical value is expressed as a logical zero (low level) and this second logical value is expressed as a logic one (high level).
35. the method according to claim 33 is characterized in that: the change of the amplitude of this timing signal (X) (X1, X2) be expressed as the amplitude of this timing signal (X) decline (X1, X2).
36. be used for obtaining the radio clock (1) of temporal information by the timing signal that is sent out (X),
-this receiving circuit has at least one antenna circuit (2) that is used to receive these timing signals that are sent out (X) according to one receiving circuit (4) in the claim 1 to 21 to have one,
-have a decoding and an evaluation device (5,6) that is connected this receiving circuit (4) back, be used for the timing signal (X) that is received by this receiving circuit (4) is decoded and evaluation.
37. the radio clock according to claim 36 is characterized in that: this decoding and evaluation device (5,6) are the ingredients as the control device (12) of logical circuit formation.
38. the radio clock according to claim 36 is characterized in that: this radio clock (1) is by obtaining temporal information according to one method in the claim 22 to 35.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10357200 | 2003-12-08 | ||
| DE10357200.7 | 2003-12-08 | ||
| DE102004002776A DE102004002776A1 (en) | 2003-12-08 | 2004-01-20 | Receiver circuit for radio-controlled clock, has circuit amplifying time signal to produce amplified time signal, and including adjustable amplifier with variable amplification factor that is adjusted depending on signal frequency |
| DE102004002776.5 | 2004-01-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1684010A CN1684010A (en) | 2005-10-19 |
| CN1684010B true CN1684010B (en) | 2012-02-22 |
Family
ID=34638473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004101006321A Active CN1684010B (en) | 2003-12-08 | 2004-12-08 | Receiver circuit for radio clock and method for operating receiving circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1684010B (en) |
| DE (1) | DE102004002776A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4858341B2 (en) * | 2007-07-19 | 2012-01-18 | カシオ計算機株式会社 | Radio wave receiver |
| CN101447766B (en) * | 2007-11-27 | 2012-08-01 | 立锜科技股份有限公司 | Single-output operational amplifier be capable of eliminating excursion and method thereof |
| CN112286033A (en) * | 2020-08-14 | 2021-01-29 | 陕西千山航空电子有限责任公司 | Time system device based on distributed acquisition record |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3236162A1 (en) * | 1982-09-30 | 1984-04-05 | Rainer Dipl.-Ing. 6500 Mainz Bermbach | Self-tuning narrow-band receiver |
| DE3504338A1 (en) * | 1985-02-08 | 1986-08-14 | Rainer Dipl.-Ing. 6500 Mainz Bermbach | Frequency adjustment in radio clocks |
| EP0201061A2 (en) * | 1985-05-10 | 1986-11-12 | TELEFUNKEN electronic GmbH | Receiver for amplitude-modulated time signals |
| DE3641161A1 (en) * | 1986-12-02 | 1988-06-09 | Ulrich Dipl Ing Bellmann | Narrow-band crystal-controlled audion receiver |
| DE3719650A1 (en) * | 1987-06-12 | 1988-12-22 | Forschungsgesellschaft Fuer Fe | Controller for radio time signal receiver |
| DE4227502A1 (en) * | 1992-08-20 | 1994-03-03 | Mikroelektronik Und Technologi | Receiver for amplitude sampled time character signals - with two input amplifiers selectively switched in to select reception frequency for optimum sensitivity |
| DE4242384A1 (en) * | 1992-12-08 | 1994-06-16 | Mikroelektronik Und Technologi | Homodyne receiver for amplitude-sampled radio time signals - has code-selective switchable time constant in integrating circuit sepg. DC component for gain control of input amplifiers |
| US5930697A (en) * | 1995-06-16 | 1999-07-27 | Temic Telefunken Microelectronic Gmbh | Heterodyne receiver with synchronous demodulation for receiving time signals |
| CN1238479C (en) * | 2004-01-19 | 2006-01-25 | 闫玉德 | Combustion coal desulfurizing agent |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3101406A1 (en) * | 1981-01-17 | 1983-01-05 | Wolfgang Dr.-Ing. 6101 Groß-Bieberau Hilberg | Automatic radio clock adjustment |
| DE19752746C2 (en) * | 1996-12-18 | 2001-05-03 | Braun Gmbh | Time signal receiver with an electronically tunable resonant circuit |
| DE19808431A1 (en) * | 1998-03-02 | 1999-09-09 | Junghans Uhren Gmbh | Multi-channel radio clock for use in different geographical locations |
-
2004
- 2004-01-20 DE DE102004002776A patent/DE102004002776A1/en not_active Withdrawn
- 2004-12-08 CN CN2004101006321A patent/CN1684010B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3236162A1 (en) * | 1982-09-30 | 1984-04-05 | Rainer Dipl.-Ing. 6500 Mainz Bermbach | Self-tuning narrow-band receiver |
| DE3504338A1 (en) * | 1985-02-08 | 1986-08-14 | Rainer Dipl.-Ing. 6500 Mainz Bermbach | Frequency adjustment in radio clocks |
| EP0201061A2 (en) * | 1985-05-10 | 1986-11-12 | TELEFUNKEN electronic GmbH | Receiver for amplitude-modulated time signals |
| DE3641161A1 (en) * | 1986-12-02 | 1988-06-09 | Ulrich Dipl Ing Bellmann | Narrow-band crystal-controlled audion receiver |
| DE3719650A1 (en) * | 1987-06-12 | 1988-12-22 | Forschungsgesellschaft Fuer Fe | Controller for radio time signal receiver |
| DE4227502A1 (en) * | 1992-08-20 | 1994-03-03 | Mikroelektronik Und Technologi | Receiver for amplitude sampled time character signals - with two input amplifiers selectively switched in to select reception frequency for optimum sensitivity |
| DE4242384A1 (en) * | 1992-12-08 | 1994-06-16 | Mikroelektronik Und Technologi | Homodyne receiver for amplitude-sampled radio time signals - has code-selective switchable time constant in integrating circuit sepg. DC component for gain control of input amplifiers |
| US5930697A (en) * | 1995-06-16 | 1999-07-27 | Temic Telefunken Microelectronic Gmbh | Heterodyne receiver with synchronous demodulation for receiving time signals |
| CN1238479C (en) * | 2004-01-19 | 2006-01-25 | 闫玉德 | Combustion coal desulfurizing agent |
Non-Patent Citations (2)
| Title |
|---|
| 图1. |
| 图2. |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004002776A1 (en) | 2005-07-07 |
| CN1684010A (en) | 2005-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101571701B (en) | Radio-controlled timepiece and control method for a radio-controlled timepiece | |
| KR100804867B1 (en) | Time reception apparatus and wave clock | |
| CN100545770C (en) | Be used to obtain the method and the radio clock of temporal information | |
| CN1648800B (en) | Method for obtaining time information and radio clock | |
| US7583942B2 (en) | Tuning device and radio-wave corrected timepiece | |
| US7719928B2 (en) | Radio watch | |
| KR100953718B1 (en) | A time signal receiver and decoder | |
| CN101344758B (en) | Radio-controlled timepiece and control method for a radio-controlled timepiece | |
| US7333467B2 (en) | Receiver circuit and method using selectively variable amplification for receiving time signals from different transmitters | |
| CN101106388A (en) | Reception circuit, radio-controlled timepiece, and reception circuit control method | |
| CN102025385B (en) | Radio synchronous signal receiver for adjusting a time base, and method for activating the receiver | |
| JP2007147623A (en) | Method and circuit device for acquiring time information, and radio timepiece therefor | |
| CN1684010B (en) | Receiver circuit for radio clock and method for operating receiving circuit | |
| CN100552571C (en) | Radio clock | |
| US20150268637A1 (en) | Radio timepiece and receipt control method | |
| US8570839B2 (en) | Time-information obtaining apparatus and radio-controlled timepiece | |
| JP2010175328A (en) | Radio-controlled timepiece and control method for the same | |
| JP2006246419A (en) | Electric wave tuning receiving circuit, electric wave tuning receiving device, and electric wave tuning receiving method | |
| CN1987687A (en) | Radio-controlled timepiece and method of adjusting the time kept by a radio-controlled timepiece | |
| JP2002267775A (en) | Time information receiving device and radio corrected clock | |
| US20080212411A1 (en) | Programmable time signal receiver, method for programming a time signal receiver, and programming device for time signal receivers | |
| JP5037397B2 (en) | Standard radio wave receiver | |
| JPH05142363A (en) | Radio wave corrected clock | |
| US20090003140A1 (en) | Method for wireless programming of a time signal receiver, wirelessly programmable time signal receiver, and programming device for wireless programming of a time signal receiver | |
| JP5044343B2 (en) | Radio correction clock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |