초록 ▼

An improved power supply system involves load-leveling the large transient currents drawn by a high power, low duty-cycle load application circuit by means of a high performance capacitive charge storage device, such as a super-capacitor or a network of super-capacitors. The improved power supply sy

An improved power supply system involves load-leveling the large transient currents drawn by a high power, low duty-cycle load application circuit by means of a high performance capacitive charge storage device, such as a super-capacitor or a network of super-capacitors. The improved power supply system allows the high power load application circuit to be driven by a limited energy power source, such as a battery or the power supplied to a PCMCIA slot by a host computer. When the input voltage source is a battery, the improved power supply system allows for a substantial increase in the battery's operational life. The inventive system is particularly useful for managing power supply requirements for miniaturized wireless transmission systems, such as two-way pagers or radio modems, which employ low duty-cycle packet-switched RF transmitters.

대표청구항 ▼

[ What is claimed is:] [1.] An RF data transmission system, comprising:an RF transmitter that transmits digitally modulated data, the transmitter having a low duty cycle with an active transmission time interval T.sub.1 and a quiescent time interval T.sub.2, where T.sub.2 is substantially larger tha

[ What is claimed is:] [1.] An RF data transmission system, comprising:an RF transmitter that transmits digitally modulated data, the transmitter having a low duty cycle with an active transmission time interval T.sub.1 and a quiescent time interval T.sub.2, where T.sub.2 is substantially larger than T.sub.1 ;a limited energy source; anda low ESR, high capacitance capacitive device electrically coupled to said limited energy source and said transmitter, said capacitive device being operable to store energy provided by said limited energy source, said capacitive device also being operable to supply energy to said transmitter, said capacitive device having sufficient energy storage capacity to power said transmitter during said time interval T.sub.1, said capacitance device having a sufficiently low ESR to allow said capacitance device to meet substantially all of the power demands of said transmitter when the ESR of said limited energy source is too high to allow said limited energy source to meet the load demands of said transmitter.