msp430The LDC1312 and LDC1314 are 2- and 4-channel,
1? Easy-to-use – minimal configuration required
12-bit inductance to digital converters (LDCs) for
? Measure up to 4 sensors with one IC
inductive sensing solutions. With multiple channels ? Multiple channels support environmental and and support for remote sensing, the LDC1312 and aging compensation LDC1314 enable the performance and reliability benefits of inductive sensing to be realized at minimal? Multi-channel remote sensing provides lowest cost and power. The products are easy to use, onlysystem cost requiring that the sensor frequency be within 1 kHz ? Pin-compatible medium and high-resolution and 10 MHz to begin sensing. The wide 1 kHz to 10 options MHz sensor frequency range also enables use of very small PCB coils, further reducing sensing– LDC1312/4: 2/4-ch 12-bit LDC solution cost and size.– LDC1612/4: 2/4-ch 28
function [alpha,N,U]=youxianchafen2(r1,r2,up,under,num,deta)
%[alpha,N,U]=youxianchafen2(a,r1,r2,up,under,num,deta)
%該函數用有限差分法求解有兩種介質的正方形區域的二維拉普拉斯方程的數值解
%函數返回迭代因子、迭代次數以及迭代完成后所求區域內網格節點處的值
%a為正方形求解區域的邊長
%r1,r2分別表示兩種介質的電導率
%up,under分別為上下邊界值
%num表示將區域每邊的網格剖分個數
%deta為迭代過程中所允許的相對誤差限
n=num+1; %每邊節點數
U(n,n)=0; %節點處數值矩陣
N=0; %迭代次數初值
alpha=2/(1+sin(pi/num));%超松弛迭代因子
k=r1/r2; %兩介質電導率之比
U(1,1:n)=up; %求解區域上邊界第一類邊界條件
U(n,1:n)=under; %求解區域下邊界第一類邊界條件
U(2:num,1)=0;U(2:num,n)=0;
for i=2:num
U(i,2:num)=up-(up-under)/num*(i-1);%采用線性賦值對上下邊界之間的節點賦迭代初值
end
G=1;
while G>0 %迭代條件：不滿足相對誤差限要求的節點數目G不為零
Un=U; %完成第n次迭代后所有節點處的值
G=0; %每完成一次迭代將不滿足相對誤差限要求的節點數目歸零
for j=1:n
for i=2:num
U1=U(i,j); %第n次迭代時網格節點處的值
if j==1 %第n+1次迭代左邊界第二類邊界條件
U(i,j)=1/4*(2*U(i,j+1)+U(i-1,j)+U(i+1,j));
end
if (j>1)&&(j U2=1/4*(U(i,j+1)+ U(i-1,j)+ U(i,j-1)+ U(i+1,j));
U(i,j)=U1+alpha*(U2-U1); %引入超松弛迭代因子后的網格節點處的值
end
if i==n+1-j %第n+1次迭代兩介質分界面（與網格對角線重合）第二類邊界條件
U(i,j)=1/4*(2/(1+k)*(U(i,j+1)+U(i+1,j))+2*k/(1+k)*(U(i-1,j)+U(i,j-1)));
end
if j==n %第n+1次迭代右邊界第二類邊界條件
U(i,n)=1/4*(2*U(i,j-1)+U(i-1,j)+U(i+1,j));
end
end
end
N=N+1 %顯示迭代次數
Un1=U; %完成第n+1次迭代后所有節點處的值
err=abs((Un1-Un)./Un1);%第n+1次迭代與第n次迭代所有節點值的相對誤差
err(1,1:n)=0; %上邊界節點相對誤差置零
err(n,1:n)=0; %下邊界節點相對誤差置零
G=sum(sum(err>deta))%顯示每次迭代后不滿足相對誤差限要求的節點數目G
end
DESCRIPTION
The Texas Instruments MSP430 family of ultra-low-power microcontrollers consists of several devices featuring
different sets of peripherals targeted for various applications. The architecture, combined with five low-power
modes, is optimized to achieve extended battery life in portable measurement applications. The device features a
powerful 16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code efficiency.
The digitally controlled oscillator (DCO) allows wake-up from low-power modes to active mode in less than 1 μs.
The MSP430G2x13 and MSP430G2x53 series are ultra-low-power mixed signal microcontrollers with built-in 16-
bit timers, up to 24 I/O capacitive-touch enabled pins, a versatile analog comparator, and built-in communication
capability using the universal serial communication interface. In addition the MSP430G2x53 family members
have a 10-bit analog-to-digital (A/D) converter. For configuration details see Table 1.
Typical applications include low-cost sensor systems that capture analog signals, convert them to digital values,
and then process the data for display or for transmission to a host system.
AEC-Q100 qualified
? 12 V and 24 V battery systems compliance
? 3.3 V and 5 V logic compatible I/O
? 8-channel configurable MOSFET pre-driver
– High-side (N-channel and P-channel MOS)
– Low-side (N-channel MOS)
– H-bridge (up to 2 H-bridge)
– Peak & Hold (2 loads)
? Operating battery supply voltage 3.8 V to 36 V
? Operating VDD supply voltage 4.5 V to 5.5 V
? All device pins, except the ground pins, withstand at least 40 V
? Programmable gate charge/discharge currents for improving EMI behavior
transimpedance linearization circuitry. This allows it to drive
video loads with excellent differential gain and phase perfor
mance on only 50 mW of power. The AD8001 is a current
feedback amplifier and features gain flatness of 0.1 dB to 100 MHz
while offering differential gain and phase error of 0.01% and
0.025°. This makes the AD8001 ideal for professional video
electronics such as cameras and video switchers. Additionally,
the AD8001’s low distortion and fast settling make it ideal for
buffer high-speed A-to-D converters.
The AD8001 offers low power of 5.5 mA max (VS = ±5 V) and
can run on a single +12 V power supply, while being capable of
delivering over 70 mA of load current. These features make this
amplifier ideal for portable and battery-powered applications
where size and power are critical.
The outstanding bandwidth of 800 MHz along with 1200 V/μs
of slew rate make the AD8001 useful in many general purpose
high-speed applications where dual power supplies of up to ±6 V
and single supplies from 6 V to 12 V are needed. The AD8001 is
available in the industrial temperature range of –40°C to +85°C.
I saw the light of the future when I first read Ray Kurzweil’s best-seller book The
Singularity Is Near: When Humans Transcend Biology. One cubic inch of nanotube cir-
cuitry, once fully developed, would be up to one hundred million times more powerful
than the human brain.
Licensed spectrum remains 3GPP operators’ top priority to deliver
advanced services and user experience
Opportunistic use of unlicensed spectrum is becoming an important
complement for operators to meet the growing traffic demand
Moving forward 3GPP operators will have two options to offload
traffic to unlicensed spectrum:
1. Wi-Fi (via LTE/Wi-Fi interworking)
2. LTE over unlicensed
It will then be up to each individual operator to choose which
approach to use, which will depend on a number of factors
The current methods of communications are becoming less relevant under
today’s growing demand for and reliance on constant connectivity. Of
decreasing relevance are the models of a single radio to perform a single
task. The expansion of wireless access points among coffee shops, airports,
malls, and other public arenas is opening up opportunities for new services
and applications.
