помогите найти и описать график на английском языке

График возьмите здесь:

http://www.gpskit.nl/diagram-description-en.htm
А вот его описание:

Supply

The GPS interface can be fed in 2 ways: with a stabilized 5V supply or with a 10 to 25V unregulated DC supply. In both cases the power is fed into the RJ45 connector on point 8. Pin 7 is DC ground.

The power supply current is first secured with a slow 315mA fuse (in socket). Then there is a Transzorb device to ground. This device is a short-circuit for reverse polarity voltages and for voltages above 27V. It causes the fuse to blow and in doing so, protecting the other electronics and GPS module.

After the Transzorb there are several other components for filtering and the unregulated voltage is supplied to the switching regulator U2. This LT1107CN8-5 (datasheet) produces 5V without much heat losses. A linear regulator like a 7805 would dissipate approx. 2 Watts. With this switching regulator the dissipation is limited to max. 0,3Watts. R10 defines the output voltage. If it is 0 ohm, the output voltage would be exactly 5V. We chose to make it 5k6 ohm so the output voltage becomes approx. 5,1V. This is done to compensate for the loss in the filter around L3. R9 is only used when you use the adjustable version of the LT1107, and since we supply the fixed 5V output version, this position stays unpopulated.

The regulated 5V is then wired to the 2-position jumper SW5. With this jumper we can choose between the 5V from the LT1107 regulator (position 2), or from an externally supplied 5V regulated supply (position 1). After this jumper ther is an additional Transzorb to ground. This one short-circuits everything above 6V. If the SW5 jumper is in position 1 (external 5V) and a higher voltage is supplied, this Transzorb burns the fuse end protects the sensitive GPS module.

After some more filtering (C6, L3, C7, C8) the +5V is offered to the GPS module and the RS232 converter. There is also a simple charging circuit consisting of D6, D7 and R6 for an optional NiCd battery to keep the real-time clock and static ram of the GPS module powered, as to speed up locking to the GPS constellation after power-up. However, we chose to not deliver this NiCd battery and instead offer a 0,22F 5,5V supercap, that can be soldered directly onto the GPS module. This supercap keeps the clock running for approx. 2 days. If you want longer retention you will have to mount a 3,6V NiCd PCB-mount battery, for example the Emmerich NC-M120-3,6V type, or any other 3,6V NiCd or NiMH type. You can also choose to use a non-recharable 3V Lithium cel. In that case, do not mount the charging circuit or disconnect it from the battery.

Via jumper SW4 and a 10 ohm series resistor R7 5V is offered to the GPS module to feed an external active antenna. When you use a passive antenna, leave SW4 open.



http://www.pro-spo.ru/po/1167--diagram-designer