JPH01265726A - Receiver for mobile communication - Google Patents

Abstract

PURPOSE:To reduce current consumption by energizing a tuner circuit around a time when a PLL is made stable at the intermittent reception. CONSTITUTION:No power is supplied to a tuner circuit 120 except a PLL 130 during a period when the PLL 130 is unstable in the period of reception processing. That is, since a voltage is supplied to circuits 121 to 126, 162 remaining in the tuner circuit 120 after the PLL 130 is made stable, the current consumption of the circuits 121 to 126, 162 while the PLL 130 is unstable is saved. Thus, the entire current consumption is reduced.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Industrial application field B. Summary of the invention C Conventional technology One problem that the invention aims to solve E. Means to solve the problem action G Example G1 first embodiment (Figures 1 to 2) G2 other examples 1” Effects of the invention A. Industrial application field The present invention relates to a receiver for mobile 1jrI and others.

B. Summary of the Invention This invention reduces the extinguishing current by controlling the power-on timing when a two-to-one-less telephone, for example, performs reception intermittently and is on standby. It is something.

In books such as ``C prior art)'' and in the United States, a telephone system called ``J-Torres Telephone'' has been considered.
1) and a transmitter/receiver (2) called a base unit, and a telephone line (3) is connected by radio waves between the base unit (2) and the handset (1), and the telephone line (3) is connected to the base unit (2) and the handset (1), and the telephone line is connected to the base unit (2) and the handset (1). is Hunt St. (1)
This is done in the same way as a regular telephone.

In addition, the distance that the hand cent (1) can be separated from the base unit (2), that is, the service area is:
It is about 100m. In addition, the frequency of radio waves used between HuntScent (1) and base unit (2) is
In the case of the United States, the upstream channel is in the 49 MHz band, the downstream channel is in the 4'6 MHz band, and 10 channels are allowed.

Therefore, it is best to join the hunt set (1) when making a phone call.
can be moved freely, for example, 'li1' outdoors.
You can use stories. Furthermore, the 'dIi-stuffed coat does not become tangled or become a hindrance.

Figure 4 outlines the signal threads of such Hunt Seno l-(11 and Base Uni, 112+).

In other words, when transmitting a call, use the hunt setter and the transmitter (1
11) is supplied to the VCO of I) L (If5) (not shown) through an amplifier (112) and an adder circuit C1, 14> and outputs the FM of the upstream channel.
This signal Su is supplied to the antenna (110) through the high frequency power amplifier (117) 1111 and transmitted to the base unit ('200).

In the base unit (2), a signal (radio wave) Su is received by the antenna (200), and this signal Su is sent from the antenna input circuit. 'M fjt l&
The audio signal St is demodulated from the FM (No. 4 Su) by being supplied to the tuple super one-way tuner circuit (220) having up to one circuit, and this signal St is sent to the amplifier (22'?
) - 4-wire/2-wire conversion circuit I Raku (23]) - Relay circuit (
232) to the telephone line (3).

Also, when receiving a call, the phone i1i! The Azugishi signal Sr from the i line (3) is relay circuit Wb (232) - i switching circuit I (231) - amplifier (212) - ten adder circuit (2] 4)
VC of P L L (215') through the signal line of
No. 16 Sd is supplied to the FM signal Sd of the down channel (not shown), and this No. 16 Sd is supplied to the high frequency power amplifier (
2*7) is supplied to the antenna (200) and transmitted to Hough 1-cent (1).

Then, in the hunt set (1), the signal Sd is received by the antenna (If)O), and this signal Sd is
The audio signal Sr is output from the FM signal 't' (Sd) by being supplied to a double super one-way tuner circuit ('120) having an antenna input circuit to an FM demodulation circuit.
This (No. 4 Sr is connected to the receiver (
'12B) to be paid.

Furthermore, (-140) and (240> indicate all microphones and 1 computer for the system controller 1-, and these microcomputers (140) and (240) make the following calls when making and receiving calls. Processing takes place.

In other words, when making a call, Hunt St. (1) smell -ζ
, l・-Kuki- (152) from standby mode to 1-
When one mote is selected, signal 1 from the microcontroller (140)
'XEN' controls PLL (115), and sending of the 'I-'M signal Su is permitted. Next, the microcomputer <140) outputs a command signal CFIN+) (details will be described later) indicating a call, and this command signal CMND is sent to the PL through the adder circuit (11, 4).
L (115) and therefore the command signal C
An FM signal Su subjected to FMM modulation by the MND is transmitted from the antenna ('1.00).

Therefore, the command signal CMND is taken out from the tuner circuit (226), but this is not the same as the shaping circuit (226).
263) to the microcomputer (240), and it is determined that the call is an outgoing call. ’ and the microcomputer (240
), the relay circuit (232) is controlled to the off-footer state, and the conversion circuit (231) changes to the relay circuit (232).
is connected to the line (3) through the signal 'I'
Only the FM signal Sd is allowed to be transmitted by X E N.

Therefore, the handset (1) has a base unit (
This means that it is connected to line (3) through 21.

Therefore, when the telephone number of the other party is entered manually using the dial key (151), a command signal CM N l is transmitted that indicates the transmission of the telephone number and has the data of the manually entered telephone number.
) is output from the microcomputer (1, 40) and transmitted by a 1''M signal Su.

Then, this 1·゛M signal Su is -, -suuninoto (2
), the command signal CMND is discriminated by the microcomputer (240), and the microcomputer (240) outputs the dial signal forming circuit (265).
) is controlled and the encode signal (+) corresponding to the telephone number sent by the command signal
=l''M F signal) Tl4NG is formed, and this signal 1' E N C is supplied to the amplifier (227) and sent out to the line (3).

Therefore, each time the signal 1'E SC is sent out, the other party is called, and if phase 1 answers the call, from then on,
1- You can make a phone call as described above.

Furthermore, when a call arrives, the link signal when the call is received is detected by the detection circuit (268), and the microcomputer (2, 10) indicates the incoming call according to the detection signal. signal CMNυ is output, and this signal CMNO passes through addition circuit II (214)
) L1-(215) and transmitted by the FM signal Sd.

And in hand cent (1), this command]
- Signal CMND is taken out from the nayuna circuit (12G) and supplied to the microcomputer (140) through the shaping circuit (163). Then, the ringer (166) is driven by the microcomputer (1, 10) and the user is notified that there is an incoming call.

Then, when the talk switch (152) is set from standby mode to talk mode I, the same process as when making a call is performed, and the handset (1) is connected to the line (3) through -\-Sunisoto (2). Therefore, from now on, you can talk to the other party.

Then, when the call ends, 1-kuisona (15
2) When the 1-" mode is changed to standby mode, a command signal CMNI) is generated in the microcomputer (140) without indicating the end of the call, and this is transmitted by the 1-"M signal Su, and then the signal 1-" Transmission of the 1.M signal Su is stopped by ``χUN''.

In addition, in the base unit (2), when a call 1-sign'F+CMND is sent without indicating the end of the call, the relay circuit (232) is controlled to be on-hook by the microcomputer (240), and FM by signal TχEN
(The transmission of the issue Sd will be stopped.

Therefore, from now on, the hunt seso 1-fil and the base unino l-(21) will wait for a call to be made or a call to be received.

FIG. 5 shows an example of the signal format of the command signal CMNυ, and this signal C? IND has 12 bins 1 at the beginning.
Above, this example has a 16-bit bit synchronization signal BSYN, followed by a 16-bit frame synchronization signal (i).
It has t No. 1'sYN. In this case, these signals BS
VN.

1'SYN is, for example, BSYN-” 01010101 (11010101”
FSYN=”1100010011010110”
...FSYN-1001001100110110"...
- Has a specific Pino] pattern indicated for the downstream channel.

Furthermore, the command-signal CMN11 is the signal FSY
N followed by a 12-bit error correction code ECC for the paired handset 1) and the base Uniso 1- (26-bit identification code 1''lLl and this identification code IL). 1-' CTRL followed by an 88-bit control code 1-' CTRL.

In this case, the identification coat It) is hand seso]・(1)
and Base Unino Day 2) between Comman i Signal CMNO
Each time is accessed, it is checked on the receiving side, and the bare bread 1: seso t-(11 and base uniso 1
-421, its command signal CMN
II is enabled. Therefore, this identification code (D) is stored in the Hunt Seso l-(11 RAM (i!54.) and Base Uninote (2)0) RAM <254).

In addition, the control code 1"CTRL is a code that controls the opening and closing of the channel between the Hunt Seventeenth Day 1) and the Base Unit Day 2) as described above, and is the transmission of the telephone number of the other party, and that telephone number. There is a coat etc. that does not indicate that it is
For example, when opening a channel, it has the data of the first hint pattern and dummy data, and when it is the other party's phone number, it has the data of the second hint pattern and the data of that phone number. As shown in the figure, the type of control is data (operan 1) and data necessary for the control (operan 1-).

In addition, the command) and the signal CMNII;
ll (No. i BSYN, FSYN is an NRZ signal, but identification code 11) ~ control code C1'llL is,
N r < z signal is a converted Splino l-phase signal (Manchester court). Also, signal -C
The transmission i fidelity of MNll is, for example, 1200 bps.

Therefore, when the command signal CMND is sent,
No. 44 Su + Sd SK signal c MS K 4
No. 8).

So, when making a double call or receiving a call,
If the identification call ID check is performed, even if a third party prepares a handset of the same type as 11, it will not be possible for a third party to intercept or eavesdrop on the phone. I can't.

FIG. 6 shows an example of a tuner circuit (120) (and (220)). That is, base unino 1. The signal Sd from +21 is received by the antenna (ion), and the received signal Sr is supplied to the 1i-th Kizata 1st-wave (122) through the Hough L-pass amplifier (121) whose passband is all the down channels. , VCO (131
) and the oscillation signal of a predetermined frequency is sent to the mixer circuit (122).
The signal Sr is supplied as a first local oscillation signal to the signal Sr, and is frequency-converted into a first intermediate frequency signal.

Further, this first intermediate frequency signal is supplied to the second mixer circuit (124) through the first intermediate frequency amplifier (123), and a frequency divided signal of a predetermined constant frequency is supplied from the frequency dividing circuit (136) to the mixer circuit. (124) as a second local oscillation signal, the ζ first intermediate frequency signal is frequency-converted into a second intermediate frequency signal, and this signal is passed through the second intermediate frequency amplifier (125) to the 1.゛M demodulation circuit (126). and the audio (No. 8 Sr is extracted).

In this case, the VCO (13) is connected to the other circuit (
1; U2)・〜(13ti) together with PLL(130)
It consists of The oscillation signal of the VCO (13) is supplied to the I/N variable frequency divider circuit (132).
The frequency is divided into the frequency of
133) and a fixed oscillation circuit (135).
) is supplied to the frequency dividing circuit (136) and frequency-divided, the frequency-divided signal is supplied to the comparison circuit II (133) as the reference 1 picture number, and its phase comparison output is 1:I-Has) It is supplied to the 7VCO (131) through the filter (134) as its control signal.

Further, a control example CII NL specifying a channel is supplied from the microcomputer (140) to the frequency dividing circuit (+32), and a frequency division ratio N is set based on this signal CIINL.

Furthermore, a detection circuit (16) is added to the intermediate frequency amplifier (1, 25).
2) is connected, and a detection signal S[lLC is extracted from the level of the intermediate frequency signal, regardless of the presence or absence of the 1.M signal Sd,
This signal 5IJLC is supplied to the microcomputer (1, 40).

Therefore, the frequency division ratio N? is determined by the signal C11NL? l
, l control allows the oscillation frequency of the VCO (131) to be controlled, thereby making it possible to arbitrarily change the receiving channel of the tuner circuit (12(1)).

Also, if the FM signal Sd can be received with the reception channel set by the signal C11N L, it can be sent to the signal SQL.
can be known by the command signal CMN.
From the identification code ID in D, it is possible to know whether the FM signal Sd was sent to the own station.

By the way, in the case of a cordless telephone such as a "double series", the hand socket (1) is of course cordless, and has a built-in battery, which is used as the operating wire. Therefore, the current consumption of the handset (1) is required to be as low as possible.

Therefore, it has been proposed to turn off the power to the transmitting string of the handset (I) and turn on the power to the receiving string intermittently during standby. However, as shown in FIG. 7, for example, during standby, the cycle is '1'-2 seconds, and within this period '1', the operating voltage is applied to the tuner circuit (120) for τ - several l'im seconds. is supplied and the remaining period (T-
In r), an operating voltage is supplied to the tuner circuit IM (120) so that it does not turn off. Also, it is necessary to supply the operating voltage to the transmitting thread during the entire standby period.

In this way, for each period 'l', the period τ is 1-'
The reception of M-8 Sd is monitored.

Then, during the period (′1゛−τ), the Chico, −S circuit (1
20) Since the current consumption in step 20) is eliminated, the battery extinguishing current can be reduced as a whole. For example, the total current consumption of the tuner circuit (120) is about 16 mA, so turning off the power of the tuner circuit (120) during the period ('1'-τ) after the period 'I' is a great way to save power. becomes.

Literature: Specification and Figure 1h1 of Tokukai No. 63-5978)
] Problems to be Solved by the Invention However, in general, I)LL requires a zero period (lockup time) of about 300 msec after the power is turned on until the operation becomes stable.

Therefore, in the tuner circuit (120) using P L L (130) as shown in the second side, when the operating voltage is intermittently supplied every period τ and the receiving operation is performed intermittently, , the period τ becomes - (also l) L L (1
30) Continue for at least 300m until it stabilizes.
The FM signal Sd cannot be detected in seconds. Therefore, in the above-mentioned Hunt Senoh (11), it is necessary to set the period τ to <1, which increases the current consumption of the battery.

This invention attempts to solve such problems.

G] A final means to solve the problem Now, the tuner circuit (120) and )) L L (13
0), as mentioned above, PL
l, (130) is unstable for a zero period (lock-on time) of about 300 msec from the time the power is turned on. but,
Tuner circuit (120') 0) I) L L, (
Remaining circuits (121) to (126) excluding 130)
, (162) operates almost normally from the time the power is turned on.

The tuner circuit II (120) as a whole operates normally only when I) t, t, (130) are in a stable operating state, and the remaining circuits (121) to (1)
261 (] 62) is also in a normal operating state.

In this invention, the 4th mark is placed on the dot like ``-'', and the tuner is turned 1 times.
When turning on the power of Raku (120), P ] - L (1
3(1) until it becomes stable (lock-on time), the remaining circuit (12) of the tuner circuit (120)
The operating voltage is not supplied to 1) to (126) and (162), but the operating voltage is supplied after I) L L (130) becomes stable.

During intermittent reception of F action, the tuner circuit (120) is energized around the time when Pl and L (130) become stable, reducing current consumption.

G Example G1 First Example In FIG. 1, (1,71,) indicates a battery for power supply, and in this example, the battery (171) is a rechargeable battery such as a nickel-cadmium battery. . SoG, this battery (1, '71) is connected to the microcomputer (140
) is connected to the power supply terminal Voo of the tuner circuit (120) and the power supply line of the detection circuit (162) through the switch circuit (+72).

Furthermore, the battery (1'/I) is connected to the switch circuit (1'73)
The circuits (131) to (136) of the PLL (130)
) is connected to the power supply line of the switch circuit (
174) to the remaining circuits (12) to (1, 17) and other power lines.

In addition, as shown by the solid line in Fig. 2, the microcomputer (140) outputs a signal s3 which becomes "1" at the starting point L1 of the period '■' and becomes "0" at a predetermined time t3. This signal s3 is supplied to the switch circuit 1/a (173) as a control signal, and when s3 is "1", the inch circuit II (1'/3) is turned on. Furthermore, the microcomputer (140) sends information from time t1. ! : Time point 1 between points t-1. ! The signal s,! which becomes "1" at time t3 and becomes "(B") is taken out, and in addition, U+87 is supplied to the switch circuit (1'/2) as a control signal for B, and when S2="1", At this time, the switch circuit (172) is turned on.

In this case, the period ((, ~1.) is 1]I7+-
(130) and then P L L (1
30) becomes stable, for example, about 3 (l Om seconds). and command 1 - identification code 1" I in signal CMND
The sum of the periods required to determine I) is approximately room seconds.

Further, a predetermined signal s4 is taken out from the microcomputer (1, 40), and this signal Sd is supplied to the switch circuit (174) as its control signal, and when s4 is "1", the switch circuit (174) is turned on. be done.

According to such a configuration, at time t1, S3-“
'1'', the Su-Ino thousand circuit (173) turns on, and the voltage of the battery (], 71.) changes to the switch circuit (17).
3) is supplied to 7PLL (130) through 1)
L I-(130) f=;l: The operation starts from time point L1.

So L7, time L 2 d;'J: 6 g, l) l-L
(130) 0. ) operation is stable, and the Nayannel oscillation signal according to the signal CHN L is transmitted to the Miki 9~circuit (12
2). Moreover, at this time point t2, S2 becomes "'1", so the switch circuit (17
2) is turned on, and the voltage of the battery (171,) changes to the times of the nayuna circuit (120) @ (121') to (126>,
(supplied to 162X and these start operating.

Therefore, from time t2, signal 5QLC causes t'M
The presence or absence of the signal Sd is detected, and if the signal Sd is received, the identification code 1) in the command signal CMNI) is checked; if the signal Sd is not obtained, the signal S
If the identification code FID does not match even if d is obtained, S2 is set to ``O'' + 33-``0'' (at time t3
), thereby a switch circuit (172).

(]'13) is turned off and the circuits (1, 21) to (12
6).

The power supplies of (162) and (130) are turned off from time point L3.

This state continues until the next time point L1, and at the next time point t1, the above-described operation is repeated one time.

In addition, when the identification code llJ matches the period (1, to 1.+) (this is when there is an incoming call), Fig. 2A,
As shown by the broken line on the right side of 13, S2- continues after time t).
"1", Si="i" remains, and C
As shown by the broken line in FIG.
The voltage of 1) is supplied to the remaining circuits (112) to (117,) etc. through the switch circuit (174), and henceforth, incoming calls are processed.

In this way, according to the present invention, during standby, the receiving operation is performed intermittently with the period ``'' as a period, but in this case, especially according to the present invention, the period (t
~t3) (7) Among them, during the period (1 to 1.) when PLL (130) is not stable, P I-L (130
), the power is not supplied to the tuner circuits (120) except for the tuner circuits (120), so power is not supplied to the tuner circuits (120) except for the tuner circuits (120) after the PLL (130) is stabilized.
1) to (126) and (162), the period when the PLL (130) is unstable is (
tx~t2) circuits (121)~(126')
, (162) can be saved, and the overall current consumption can be reduced. For example, tuner circuit (1
20) when the total current consumption of the PLL circuit (1
The current consumption of 30) is 4. Since it is about mA, the period (tz ~
t2), 12 m^ of current can be saved.

G2 Other Embodiments In the above description, the PLL (130) may be shared by the receiving line and the transmitting system. In addition, the handset (1
) and the pace unit (2), a control channel can also be used, like a personal radio.

Furthermore, period i;I (t 2 ~ t a ) d is de M
Only the presence or absence of the signal Sd may be detected, and if the signal Sd is not obtained, the switch circuits (172) and (173) are turned off, and when the signal Sd is obtained, the processing after checking the identification code F'ID may be performed. In addition, the switch circuit (172)
~ (174) is not provided, and the signal $2~s4 is used)
It is also possible to control the current consumption of each circuit by controlling the bias voltage of the L-run Yunostar, for example. Furthermore, the microcontroller ('140)
~1+), the power down mode is set to 1-, and at this time, if only the 1-key (1,52) is connected, the current consumption can be further reduced.

In addition, if you perform reception operations intermittently, not only with coated telephones, but also with intermittent reception operations, I) Ll,
The present invention can be applied to any receiver that uses, for example, a pager or a transceiver.

I (Effect of the Invention) According to this invention, the period for performing reception processing (tz~1
．． ), I) During the period (1+ to 17) when L I-(130) is not stable, l' L L' (130
), so power is not supplied to the nayuna circuits (1, 20) except for ), that is, l) L L
After (130) becomes stable, the nayuna circuit (+20) goes to the remaining circuit (121) -(126), (162)
Since voltage is supplied to , its l−' L L, (
130) is unstable period (Lt-L)) Kr3keZy'aEnl# (121) - (426).

(162) can be saved, and the overall current consumption can be reduced. For example, the tuner circuit (120)
When the total consumption of DC is 6 mA per month, P L Ll path (1
The current consumption of 30) is about 4mA, so the period (1+~1
>) can save 12 mA of current.

[Brief explanation of the drawing]

FIG. 1 is a connection diagram of an example of the present invention, and FIGS. 2 to 7 are diagrams for explaining the same. (120) is a tuner circuit, (1:(0)baI)L
L, (1,to) is a microcomputer, and (171) is a battery.

Claims (1)

[Claims] It has a superheterodyne configuration, and
It has a tuner circuit for reception whose local oscillation signal is generated by a PLL, and during standby, the tuner circuit performs a reception operation intermittently at a predetermined cycle and every predetermined period, and during the predetermined period, The operating voltage is supplied to the PLL, and when the operation of the PLL becomes stable after supplying the operating voltage, the operating voltage is supplied to the remaining circuits of the tuner circuit other than the PLL. Receiver for mobile communications.